JP2001168927A - Semiconductor integrated circuit device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit device, that inputs/ outputs data between LSIs with a differential signal and enables reduction in the number of data transmission lines. SOLUTION: Each transmitter TX of a transmitter side LSI 11 and each receiver RX of a receiver side LSI 12 are interconnected via a plurality of data transmission lines L. In this case, one data transmission line L is used in common between adjacent transmitters TXS and between adjacent receivers RXS. Thus, the number of the data transmission lines L is suppressed to be nearly the same number for the transmission of non-differential signal in spite of transmission reception of the data by the differential signal. Moreover, since the integrated circuit can be operated in the transmission of the differential signal at a frequency higher than the transmission of the non-differential signal, the data transmission speed can be improved in the case of transmission of differential and non-differential signals in a conventional integrated circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor integrated circuit device, and more particularly to an LSI (Large Scale Integration).
The present invention relates to a data transmission technique for transmitting and receiving data between ted circuits.

[0002]

2. Description of the Related Art Recently, a plurality of LSs are connected via a data transmission line.
In a semiconductor integrated circuit device to which I is connected, an improvement in data transmission speed is required along with an increase in the amount of transmission data.

In particular, when increasing the data transmission speed in one-way communication, it is common practice to reduce the voltage amplitude of the data signal. At that time, in order to eliminate the influence of external noise, a differential signal method is often used.

[0004] For example, as shown in FIG. 14, each transmitting device Tx ₁ of a transmitting side LSI (first integrated circuit) 101 is used.
And ～Tx _N, between each receiving device Rx ₁ to Rx _N of the receiving LSI (second integrated circuit) 201, respectively, the data transmission line L ₁ a two (a pair), L ₁ B to L _N a, connected via the L _N b, by the potential difference generated between the data transmission line L, and a method for realizing high-speed transmission of data.

However, in the case of this method, there is a problem that the number of data transmission lines L is doubled in return for suppressing the influence of external noise.

[0006]

As described above, conventionally, when increasing the data transmission speed between LSIs,
By using the differential signal system, the influence of external noise when transmitting a small amplitude signal can be suppressed, but the number of data transmission lines and the number of pads are compared with the case where the differential signal system is not used (non-differential signal system). Is required twice. For example, if the amount of data that can be transmitted is the same as that in the case of the non-differential signal system, the number of data transmission lines and pads increases significantly (in other words, the number of data transmission lines and pads in the case of the non-differential signal system is different). If the same is used, the amount of data that can be transmitted does not increase as expected).

An object of the present invention is to use a differential signal system capable of operating at a high frequency, and to reduce the number of data transmission lines and the number of pads as compared with the conventional differential signal system, and to transmit data. An object of the present invention is to provide a semiconductor integrated circuit device capable of increasing a data amount.

[0008]

According to the present invention, there is provided a semiconductor integrated circuit device comprising: a first integrated circuit having at least two or more transmitting devices for outputting data; A second integrated circuit having at least one receiving device for performing detection, and a plurality of data transmission lines connecting the transmitting device and the receiving device; and It is characterized in that it is shared between transmission devices.

Further, a semiconductor integrated circuit device according to the present invention has a first integrated circuit having first and second transmitting devices for outputting data, and a second integrated circuit having a receiving device for detecting the data. And a first data transmission line connecting the first transmitting device and the receiving device,
And a second data transmission line for connecting the first and second transmitting devices and the receiving device.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
1 schematically shows a configuration example of a semiconductor integrated circuit device according to the embodiment.

This semiconductor integrated circuit device has a transmission side LSI.
The (first integrated circuit) 11 and the receiving LSI (second integrated circuit) 12 are connected via a plurality of data transmission lines L. In this case, the transmission side LSI 11
Data transmission to the SI 12 is performed by a potential difference between a pair (two) of data transmission lines L, that is, a so-called differential signal unidirectional communication is realized.

The transmission side LSI 11 transmits transmission data S _1.
For performing output to S _N by the differential signals, a plurality of transmission pads least two or more of the transmitter Tx ₁ ~Tx _N, one end of the data transmission line L ₀ ~L _N (transmission side) are respectively connected 13 and a generator (reference signal generating means) 14 for generating a reference signal REF.

The transmitting device Tx₁~ Tx_NIs, for example, FIG.
As shown in the figure, one / the other of the adjacent transmission pads 13
Two output terminals 21a connected to each other_-1, 21a
_-2, A constant current source 21b, and a current flowing through the constant current source 12b.
Current i_OTo the transmission data S (S₁~ S _NDepending on)
Output terminal 21a_-1, 21a_-2To distribute to
And a switch circuit 21c.
Note that the transmission device Tx having such a configuration is used.₁~ Tx_NIs a tran
It can be easily realized by using a differential pair of transistors.
You.

Further, generator 14 in FIG. 1, for example, the current i _O flowing through the constant current source 21b of the transmission device Tx ₁ ~Tx _N, 1/2 the current i _O / 2, generated as the reference signal REF For the current source.

The receiving side LSI 12 transmits the transmission data S ₁
Detecting for performing a differential signal to S _N, a plurality of receiving at least two or more receiving devices Rx ₁ to Rx _N, the other end of the data transmission line L ₀ ~L _N (receiver) is connected It comprises a pad 15 and a reception data determination device 16 for determining the reception data D _{1 to} D _N.

The receiving devices Rx _{1 to} Rx _N are connected to, for example, one / the other of the adjacent receiving pads 15.
One input terminal and at least two comparators (both not shown) having at least two different reference values for detecting potential differences ΔV _{1 to} ΔV _N between the input terminals according to a magnitude relationship. It is configured.

Each of the data transmission lines L has one end connected to each transmission pad 13 and the other end connected to each reception pad 1.
5, some of which are adjacent to the transmitting devices Tx and Tx.
x and between the adjacent receiving devices Rx and Rx. Data transmission line L ₀ is connected between the generator 14 receiving apparatus Rx _1. The end of the data transmission line L on the receiving device Rx side is connected to the resistor 17 so that the characteristic impedance Z ₀ of the data transmission line L matches.
(Z ₀ = R).

That is, when the data transmission is performed by the differential signal system, the transmitting device Tx and the receiving device Rx both express data by the differential signal, and therefore, two data transmissions per one set of the transmitting and receiving device. The need for the line L is as described above.

In this embodiment, the data transmission line L connecting the transmitting and receiving apparatuses is shared between the adjacent transmitting apparatuses Tx and Tx and between the adjacent receiving apparatuses Rx and Rx, and data transmission by the differential signaling method can be realized. It is characterized by having such a configuration.

For example, the transmitting device Tx_TwoIs the data transmission line
L_TwoAnd data transmission line L_ThreeIs used to transmit data,
Data transmission line L_TwoIs the transmitting device Tx₁And also data transmission
Line L _ThreeIs the transmitting device Tx_ThreeAnd each share.

As described above, the number of data transmission lines L can be suppressed to almost the same number as in the case of the non-differential signal system, even though data transmission is performed by differential signals.
To be more precise, when the number of transmission / reception devices is N, the number of data transmission lines L is "N + 1".

The generator 14 may be inside or outside the receiving LSI, not inside the transmitting LSI. In the case of being inside the receiving-side LSI, when the number of transmitting and receiving apparatuses is N, "N" data transmission lines are required.

Here, when the data transmission line L is shared between the adjacent transmitting devices Tx and between the adjacent receiving devices Rx as in the present embodiment, the data transmission line L observed at the receiving end is Is multi-valued and the received data D
Something is needed to restore it.

This is because the detected potential difference signal of the receiving device Rx is not unique to the transmission data S from the corresponding transmitting device Tx, but is adjacent to (same as the data transmission line L).
This is because the transmission data S from the transmission device Tx is overlapped, and includes at least the corresponding reception device Rx.
Unique recovery can be achieved for the first time by using the information of the detected potential difference signal in the other receivers Rx.

[0026] For example, the potential difference [Delta] V ₃ is detected by the receiving device Rx _3, received data D ₃ corresponding to the transmission data S ₃
Cannot be restored. In this case, it must be taken into account detection potential difference signal, such as a reception device Rx ₂ adjacent. The received data D is restored by the received data determination device 16.

Hereinafter, a method for restoring the received data D will be described in detail. Here, as shown in FIG. 2, when the transmission data S is “1”, the current i _O flows through one output terminal 21a- ₁ (upper side in the figure) of the transmission device Tx. At the time of “0”, each transmitting device Tx is controlled so that the current i _O flows to the other output terminal 21a- ₂ (lower side in the figure).

The positive or negative of the reception voltage detected by the receiving device Rx is “positive” when the potential at the tip of the arrow shown between the receiving pads 15 of the receiving LSI 12 in FIG. 1 is higher than the potential at the base of the arrow. ”And“ negative ”when low.

For example, in FIG. 3, consider the transmission data S ₁ transmitted by the _first transmission device Tx ₁ . At this time, considering the data transmission line L _1, the transmission data S ₁ =
When “1”, the current i _O flows from the receiving device Rx ₁ to the transmitting device Tx _1, and when the transmission data S ₁ = "0", the current i _O
O does not flow.

On the other hand, the current i _O / 2 from the generator 14 always flows through the data transmission line L ₀ .

[0031] Thus, the received data checking apparatus 16, [Delta] V ₁ = when Ri _O / 2, the received data D ₁ is determined as _"1", ΔV 1 = -Ri received data D ₁ at the time of _O / 2
= “0”.

Next, consider the transmission data S ₂ sent by the _second receiver Tx ₂ . In this case, the value of the received data D _1, the determination threshold value (reference value) of the "0/1" of the received data D ₂ is different.

For example, when the reception data D ₁ = “1”,
Assuming that there is no error in this data transmission, the transmission data S ₁ = “1”. At this time, since the current i _O from the transmission device Tx ₁ flows through the data transmission line L ₁ , ΔV ₂ = 0
If it is detected that has a current i _O flowing to the data transmission line L _2. Therefore, it is determined that received data D ₂ = “1”.

If ΔV ₂ = −R i _O is detected, it means that no current i _O is flowing through the data transmission line L ₂ , so that it is determined that the reception data D ₂ = "0".

On the other hand, when the received data D ₁ = "0" is not the current i _O flowing to the data transmission line L ₁ by the transmitting device Tx _1, the transmission device Tx ₁ to the data transmission line L ₂ The current i _O has already flowed. Therefore, Δ
If it is detected that V ₂ = 2Ri _O, flowing current 2i _O to the data transmission line L _2. That is, the transmission device T from the receiver Rx ₂ side to the data transmission line L ₂ by the transmission device Tx ₂
It is found that i _O flowing to the x ₂ side has been added, and it is determined that the received data D ₂ = "1".

Further, when it is detected that ΔV ₂ = Ri _O is the data transmission line L ₂ not only flows current i _O. Therefore, it is determined that received data D ₂ = “0”.

Table 1 shows the potential difference ΔV ₂ and the received data D ₁ ,
It illustrates summarizes the relationship of D _2.

[0038]

[Table 1]

Next, a more general case will be described with reference to FIG.

Referring to FIG. 4, consider the transmission data S _k transmitted by the k-th (k ≠ 1, 2) transmission device Tx _k . In this case, To determine the received data D _k, and requires the received data D _k-1 and D _k-2.

For example, reception data D _k−2 = D _k−1 = “0”
, Assuming that this data transmission is error-free,
The transmission data S _k−2 = S _k−1 = “0” and the transmission device Tx
Currents i _O flow from _k−2 and Tx _k−1 to the data transmission lines L _k−1 and L _k , respectively.

Here, if the transmission data S _k = “0”,
Transmission device Tx _k rather than the data transmission line L _k, since electric current i _O to the data transmission line L _{k + 1,} the ΔV _k = "0".

On the other hand, if the transmission data S _k = "1", the transmission device Tx _k rather than the data transmission line L _{k + 1,} since electric current i _O to the data transmission line L _k, and [Delta] V _k = Ri _O Become.

Therefore, as shown in Table 2 below,
Communication data D_k-2= D_k-1= “0”, the detected potential difference Δ
V_k= 0 if received data D_k= "0", detected potential difference
ΔV _k= Ri_OThen, receive data D_k= Determined to be "1"
It is.

Transmission data S _k−2 = “1” and S _k−1 =
In the case of “0”, the current i _O flows through the data transmission lines L _k−2 and L _k by the transmission devices Tx _k−2 and Tx _k−1 , respectively, and the current flows through the data transmission line L _k−1. i _O is not flowing.

Here, if the transmission data S _k = “0”,
Transmission device Tx _k is the data transmission line L _k without, since electric current i _O to the data transmission line L _{k + 1,} the ΔV _k = Ri _O.

On the other hand, if the transmission data S _k = “1”, the transmission device Tx _k passes the current i _O not to the data transmission line L _{k + 1} but to the data transmission line L _k , so that ΔV _k = 2R i _O Becomes

[0048] Therefore, as shown in Table 2 shown below, the transmission data S _k-2 = "1" and S _k-1 = For "0", the potential difference detected ΔV _k = Ri _O if the received data D _k =
"0", it is determined the detected potential difference ΔV _k = 2Ri _O if the received data D _k = "1" and.

As described above, even when the detected potential difference ΔV _k has the same value (for example, Ri _O ), the reception data D _k differs depending on the reception data D _{k -1} and D _k-2 . come. Therefore, in order to determine correctly, the reception data D
_k-2 and D _k-1 are required.

[0050]

[Table 2]

Table 2 collectively shows the relationship between the potential difference ΔV _k and the received data D _k when all possible combinations of the values of the received data D _k−1 and D _k−2 are considered. ing.

From Table 2, it can be seen that, by using the induction method for k, when the above method is used, all k
It can be proved that the received data for can be uniquely restored.

As described above, by using a differential signal system capable of operating at a higher frequency than in the case of a non-differential signal, the number of transmission lines can be suppressed to the same number as that of the non-differential signal system. The data transmission speed can be greatly improved.

That is, since the data transmission line connecting the transmitting and receiving devices is shared between the adjacent transmitting devices and between the adjacent receiving devices, data is transmitted and received by a differential signal operable at a high frequency. , And the number of data transmission lines can be suppressed to substantially the same number as in the case of the non-differential signal system. Therefore, as a result of improving the data transmission efficiency, when trying to make the amount of data to be transmitted the same as in the case of the differential signaling method, the number of data transmission lines and the number of pads can be reduced, and If the number of transmission lines and the number of pads are to be the same as in the case of the non-differential signal system, the amount of data that can be transmitted can be increased.

The multi-level detection of differential signals (receiver Rx) in the first embodiment described above includes, for example, FIG.
A differential comparator as shown in FIG.

As shown in FIG.
It has two input terminals, two of which are applied with inputs Vin1 and Vin2 from the outside (data transmission line), and the other two with which reference voltages Vref1 and Vref2 are applied.

Here, the difference between the potential of the input Vin2 and the potential of the input Vin1 is ΔVin, and the reference voltage Vref1 is based on the potential of the reference voltage Vref2.
The difference from this potential is ΔVref.

On the other hand, the output Vout is binary, and takes a digital value of "H" when the potential difference .DELTA.Vin is larger than the potential difference .DELTA.Vref, and "L" when the potential difference is smaller than the potential difference .DELTA.Vref. Thereby, the input Vin1, Vin2
Are equal to the reference voltages Vref1, Vref2.
It can be determined whether or not the potential difference is larger than the potential difference ΔVref defined by

[0059] In this embodiment, possible values as a potential difference between the two data transmission lines L to be input to each reception device Rx _{is, -2Ri O, -Ri O, 0} , Ri O, 5 kinds of 2Ri _O is there.

Therefore, to detect this, for example, as shown in FIG. 4B, four differential comparators are prepared, and the reference potential differences are ΔVref1 and ΔVref1.
Vref2, ΔVref3, ΔVref4 may be given. _{However, -2Ri O <ΔVref1 <-Ri O} <ΔV
_{ref2 <0 <ΔVref3 <Ri O} <ΔVref4 <
So as to satisfy the relationship of 2ri _O, the reference voltage Vref
11 to Vref42 are selected. Thus, while observing the outputs Vout1 to Vout4, it is possible to determine which of the five levels the potential difference is.

[0061] For example, when the potential difference between the two data transmission lines L ΔVin = Vin1-Vin2 is Ri _O, of the output of the differential comparator, Vout1, Vout2, Vou
t3 outputs "H" level, and Vout4 outputs "L" level. Also, the potential difference ΔVi between the two data transmission lines L
When n = Vin1−Vin2 is 0, Vout1 and Vout2 of the outputs of the differential comparator are at “H” level,
Vout3 and Vout4 output “L” level.

Table 3 below shows the output Vo of each comparator.
FIG. 9 collectively shows a relationship between ut1 to Vout4 and a potential difference ΔVin between input terminals detected thereby.

[0063]

[Table 3]

Further, in the first embodiment, each receiving device side end of the data transmission line is terminated via a resistor to detect a potential difference generated between data transmissions and obtain a detection signal. Although the case has been described as an example, the present invention is not limited to this, and it is also possible, for example, by detecting a current flowing through a data transmission line. (Second Embodiment) FIG. 6 schematically shows a configuration example of a semiconductor integrated circuit device according to a second embodiment of the present invention. It should be noted that the invention of the second embodiment does not require the generator (reference signal generation circuit) for generating the reference signal REF in the first embodiment.

This semiconductor integrated circuit device has a transmission side LSI.
A (first integrated circuit) 11 and a receiving-side LSI (second integrated circuit) 12 are connected via a plurality of data transmission lines L, and transmit data from the transmitting-side LSI 11 to the receiving-side LSI 12 respectively. A so-called differential signal type unidirectional communication performed by a potential difference between a pair (two) of data transmission lines L is realized.

The transmission side LSI 11 transmits the transmission data S ₁
The output of to S _N for performing a differential signal, at least two of the transmitter Tx ₁ ~Tx _N, the data transmission line L ₁ ~
One end (transmission side) of _LN is provided with a plurality of transmission pads 13 connected to each other. The transmitting device Tx
It has a configuration similar to that of the first embodiment.

The transmission side LSI 12 transmits the transmission data S ₁
~S detection for performing a differential signal of _N, at least one receiver device Rx ₁ to Rx _N-1, the data transmission line L ₁
A plurality of receiver pad 15 to which the other end of ~L _N (receiver) is connected, and, and a received data checking apparatus 16 for judging the received data D ₁ to D _N.

The data transmission line L has one end connected to each transmission pad 13 and the other end connected to each reception pad 15.
, And a part thereof is shared between the adjacent transmitting devices Tx and between the adjacent receiving devices Rx.
The end of each data transmission line L on the receiving device Rx side is terminated via a resistor 17 (Z ₀ = R) so as to match the characteristic impedance Z ₀ of the data transmission line L.

[0069] For example, the transmission device Tx ₂ is transmitting data via the data transmission line L _2, L _3, the data transmission line L ₂
To the transmitting device Tx ₁ and the data transmission line L ₃ to the transmitting device Tx ₃
And each share.

As described above, the number of data transmission lines L can be suppressed to substantially the same number as in the case of the non-differential signal system, even though data transmission is performed using differential signals.
To be more precise, when the number of transmission / reception apparatus sets is N, the number of data transmission lines L is "N".

The method of restoring the received data D according to the present embodiment will be described below with reference to FIG. The transmitting device T
x, as a current flows i _O to one output terminal when the transmission data S is "1", "0" when the shall be controlled so that current flows i _O to the other output terminal.

The sign of the received voltage detected by the receiver Rx is “positive” when the potential at the tip of the arrow shown between the receiving pads 15 of the receiving LSI 12 in FIG. 7 is higher than the potential at the base of the arrow. ”And“ negative ”when low.

First, consider the transmission data S ₁ transmitted by the _first transmission device Tx ₁ and the transmission data S ₂ transmitted by the second transmission device Tx ₂ . At this time, the transmission data S when ₁ is "1", so that current i _O flowing to the data transmission line L _1, so that the current i _O flowing to the data transmission line L ₂ when the transmission data S ₁ is "0" Shall be controlled. Further, as current i _O flowing to the data transmission line L ₂ when the transmission data S ₂ is "1", the control so that current flows i _O to the data transmission line L ₃ at the time of transmission data S ₂ is "0" Shall be performed.

The receiving device Rx ₁ restores the transmission data S ₁ and S ₂ . The transmission data S ₁ and S ₂ transmitted from the transmission devices Tx ₁ and Tx ₂ are considered to be the following four types, and the reception device Rx ₁ detects the potential difference ΔV ₁ .

Transmission data S ₁ = “1”, transmission data S ₂ =
If "1", the transmission device Tx ₁ to the data transmission line L _1, the current through the transmission device Tx ₂ to the data transmission line L ₂ i _O
Flows, the potential difference ΔV ₁ = 0.

Transmission data S ₁ = “1”, transmission data S ₂ =
If "0", the data transmission line L ₁ through the current i _O from the transmission device Tx _1, but since the data transmission line L ₂ current does not flow, the voltage difference ΔV ₁ = -Ri _O.

Transmission data S ₁ = “0”, transmission data S ₂ =
If "1", the data transmission line L ₂ through a current 2i _O by transmitting device Tx ₁ and the transmission device Tx ₂ but, since the data transmission line L _1, no current flows, the potential difference [Delta] V ₁ = 2Ri
It becomes _O.

When the transmission data S ₁ = “0” and the transmission data S ₂ = “0”, the transmission device T is connected to the data transmission line L _2.
While current flows i _O by x _2, since the data transmission line L ₁ current does not flow, the voltage difference ΔV ₁ = Ri _O.

Therefore, the transmission data S ₁ , S ₂ and the potential difference ΔV ₁ have a relationship as shown in Table 4 below.

[0080]

[Table 4]

As a result, the received data D ₁ and D ₂ can be uniquely restored from the potential difference ΔV ₁ .

Next, consider the transmission data S _k transmitted by the k-th (k ≠ 1, 2) transmission device Tx _k . In this case, as in the first embodiment, the determining the received data D _k, and requires the received data D _k-1 and D _k-2.

In the case where the received data D _k−2 = D _k−1 = “0”, assuming that there is no error in this data transmission, the transmission data S _k−2 = S _k−1 = “0”. Yes, the transmitting device Tx _k-2 ,
The current i _O from the Tx _k-1 to the data transmission lines L _k-1 and L _k respectively.
Is flowing.

Here, if the transmission data S _k = “0”,
Transmission device Tx _k rather than the data transmission line L _k, since electric current i _O to the data transmission line L _{k + 1,} the _{ΔV k-1 = "0"} .

On the other hand, if the transmission data S _k = “1”, the transmission device Tx _k passes the current i _O to the data transmission line L _k instead of the data transmission line L _{k + 1} , so that ΔV _k−1 = R i It becomes _O.

Therefore, as shown in Table 5 below, when the reception data D _k−2 = D _k−1 = “0”, the detected potential difference Δ
V _k-1 = 0 if the received data D _k = "0", if the potential difference ΔV _k-1 = Ri _O was detected, it is determined that the received data D _k = "1".

Transmission data S _k−2 = “1” and S _k−1 =
In the case of “0”, the current i _O flows through the data transmission lines L _k−2 and L _k by the transmission devices Tx _k−2 and Tx _k−1 , respectively, and the current flows through the data transmission line L _k−1. i _O is not flowing.

Here, if the transmission data S _k = “0”,
Transmission device Tx _k is the data transmission line L _k without, since electric current i _O to the data transmission line L _{k + 1,} the ΔV _k-1 = Ri _O.

On the other hand, if the transmission data S _k = “1”, the transmission device Tx _k passes the current i _O not to the data transmission line L _{k + 1} but to the data transmission line L _k , so that ΔV _k−1 = the 2Ri _O.

[0090] Therefore, as shown in Table 5 shown below, the transmission data S _k-2 = "1" and the case of _{S k-1 = "0"} , the detected potential difference ΔV _k-1 = Ri _O if the received data D _k =
"0", it is determined the detected potential difference ΔV _k-1 = 2Ri _O if the received data D _k = "1" and.

[0091] Thus, the detected potential difference [Delta] V _k-1 is equal (e.g., Ri _O) even if the, by the received data D _k-1, D _k-2, the received data D _k is It will be different. Therefore, the received data D _k−2 and D _k−1 are required to make a correct determination.

[0092]

[Table 5]

Table 5 shows the potential difference ΔΔ when all combinations of the possible values of the reception data D _k−1 and D _k−2 are considered.
The relationship between V _k−1 and the received data D _k is shown together.

As described above, even when the detected potential difference ΔV _k has the same value, the received data D _k can be determined based on the received data D _k−1 and D _k−2 , so that the third and subsequent data are determined. In the transmission data S transmitted by the transmission device Tx, since the reception data D ₁ and D ₂ are determined from the potential difference ΔV ₁ by the reception device Rx ₁ , the third and subsequent reception data D can be easily determined.

Then, the received data determination device 16
Based on the potential difference [Delta] V _k-1 obtained by the receiving apparatus Rx _k-1, restores the received data D _k.

In the multi-level detection of the differential signal (receiver Rx) in the above-described second embodiment, for example, the differential comparator shown in FIG. Can be used. In the Rx _1, it can be determined in four levels, it is sufficient that three differential comparators of Figure 5 (a).

As described above, by using the differential signal system capable of operating at a higher frequency than the case of the non-differential signal, the number of transmission lines can be suppressed to the same number as that of the non-differential signal system. The data transmission speed can be greatly improved.

That is, since the data transmission line connecting the transmitting and receiving apparatuses is shared between the adjacent transmitting apparatuses and between the adjacent receiving apparatuses, data is transmitted and received by a differential signal operable at a high frequency. , And the number of data transmission lines can be suppressed to substantially the same number as in the case of the non-differential signal system. Therefore, as a result of improving the data transmission efficiency, when trying to make the amount of data to be transmitted the same as in the case of the differential signaling method, the number of data transmission lines and the number of pads can be reduced, and If the number of transmission lines and the number of pads are to be the same as in the case of the non-differential signal system, the amount of data that can be transmitted can be increased.

Further, in the second embodiment, each receiving device side end of the data transmission line is terminated via a resistor, thereby detecting a potential difference generated between data transmissions and obtaining a detection signal. Although the case has been described as an example, the present invention is not limited to this, and it is also possible, for example, by detecting a current flowing through a data transmission line. Third Embodiment FIG. 8 schematically shows a configuration example of a semiconductor integrated circuit device according to a third embodiment of the present invention. It should be noted that the invention of the third embodiment requires fewer receiving devices of the receiving LSI compared to the second embodiment.

This semiconductor integrated circuit device has a transmission side LSI.
(First Integrated Circuit) Each transmitting device Tx of 11 and the receiving side L
Between the SI (second integrated circuit) 12 and the receiver Rx;
The data transmission lines are connected via a plurality of data transmission lines L _{1 to} L _N , and one transmission line is shared by a pair (two transmission units) of transmission devices. That is, the transmitting devices Tx _k , Tx _{k + 1} and the receiving device Rx _{kk + 1} are connected via the data transmission lines L _k , L _{k + 1} , and the transmitting device Tx _k is connected to the data transmission lines L _k and L _{k k + 1} , and the transmitting device Tx _{k + 1} is connected to the data transmission line L
_{k + 1,} and connects the data transmission line L _{k + 1} to the transmitting device Tx
_k and Tx _{k + 1} .

The transmission side LSI 11 transmits the transmission data S ₁
For performing output to S _N by a differential signal, it is configured to have a plurality of transmission pad 13 at least two or more transmission device Tx, one end of the data transmission line L (transmission side) are connected ing. The transmission device Tx has a configuration similar to that of the first embodiment.

The receiving side LSI 12 transmits the transmission data S ₁
To _SN , at least one or more receiving devices Rx, a plurality of receiving pads 15 to which the other end (receiving side) of the data transmission line L is connected, and received data D _{1 to} D, respectively. Received data determination device 16 for determining _N
It is composed of

The data transmission line L has one end connected to each transmission pad 13 and the other end connected to each reception pad 15.
, And a part thereof is shared by the pair of transmitting devices Tx. The end of the data transmission line L on the receiving device Rx side is terminated via a resistor 17 (R = Z ₀ ) so as to match the characteristic impedance Z ₀ of the data transmission line L.

For example, the transmitting device Tx ₁ transmits data via the data transmission lines L ₁ and L ₂ , and the transmitting device Tx ₂ transmits data via the data transmission line L ₂ . The receiving device Rx ₁₂ is connected to the transmitting device Tx via the data transmission lines L ₁ and L _2.
1, receives the transmission data S _1, S ₂ from Tx _2. Also,
Transmission device Tx ₃ is data transmitted via the data transmission line L _3, L _4, the transmission device Tx ₄ is transmitting data via the data transmission line L _4. The receiving device Rx ₃₄ is connected to the data transmission line L
_3, L ₄ through a transmission device Tx _3, transmission from Tx ₄ data S _3, receives the S _4. That is, two transmitting devices and one receiving device are connected via two data transmission lines,
One transmitting device shares one of the two data transmission lines.

In the case of the third embodiment, there is no need to share a data transmission line for all adjacent transmission devices.
Further, it is not necessary to provide a generator for generating the reference signal on the transmitting side LSI 11 side.

As described above, the number of data transmission lines L in the third embodiment can be suppressed to the same number (N) as in the non-differential signal system. The number of receiving devices is
Since only one half is required for the transmitting device, the area of the receiving side can be reduced.

When considering a pair of transmitting devices Tx _k and Tx _{k + 1} , _one of the output terminals of the transmitting device Tx _{k + 1} is preferably connected to the same power supply for the sake of stability. desirable.

Hereinafter, a method of restoring the received data D according to the present embodiment will be described with reference to FIG. Here, the k-th transmitting device Tx _k and the (k + 1) -th transmitting device Tx
_{Considering k + 1} pairs, when the transmission data S _k sent from the transmission device Tx _k is “1”, the current i _O flows through the data transmission line L _k when the transmission data S _k is “0”. The transmission device Tx such that the current i _O flows through the transmission line L _{k + 1.
When the} transmission data S _{k + 1} transmitted by _{k + 1} is “1”, it is assumed that the current i _O is controlled to flow through the data transmission line L _{k + 1} . Further, when the transmission data S _{k + 1} is “0”, no control is performed such that a current flows through the data transmission line.

The polarity of the reception voltage detected by the reception device Rx _{kk + 1} is determined when the potential at the tip of the arrow shown between the reception pads 15 of the reception-side LSI 12 in FIG. 9 is higher than the potential at the base of the arrow. "Positive" is defined as "negative" when low.

The following four _{types of} transmission data S _k , S _{k + 1} transmitted from the transmission devices Tx _k , Tx _{k + 1} can be considered.

Transmission data S _k = “1”, transmission data S _{k + 1}
= “1”, the current i _O flows through the data transmission line L _k by the transmission device Tx _k and the data transmission line L _{k + 1} by the transmission device Tx _{k + 1,} so that the potential difference ΔV _{kk + 1} = 0 Becomes

Transmission data S _k = “1”, transmission data S _{k + 1}
= If "0", the data transmission line L _k current flows i _O by the transmission device Tx _k, but since the data transmission line L _{k + 1} no current flows, the potential difference ΔV _{kk + 1} = -Ri _O Becomes

Transmission data S_k= “0”, transmission data S_{k + 1}
= “1”, the data transmission line L_{k + 1}Has a transmitting device Tx_k
And transmission device Tx_{k + 1}Current 2i_OFlows, but
Data transmission line L_k, No current flows, so the potential difference ΔV
_{kk + 1}= 2Ri_OBecomes

When the transmission data S _k = “0” and the transmission data S _{k + 1} = “0”, a current i _O flows through the data transmission line L _{k + 1} by the transmission device Tx _k. since the line L _k current does not flow, the potential difference ΔV _{kk + 1} = Ri _O.

Therefore, the transmission data S _k , S _{k + 1} and the potential difference ΔV _{kk + 1} have a relationship as shown in Table 6 below.

[0116]

[Table 6]

Then, the received data determination device 16
The received data _Dk and _{Dk + 1} are restored based on the potential difference obtained by the receiving device _{Rxkk + 1} . For example, a potential difference is detected ΔV _kk + 1 = -Ri _O if the reception data D _k =
“1”, D _{k + 1} = “0”. As described above, the detected potential difference ΔV _{kk + 1} has any one of four values, so that the reception data D _k and D _{k + 1} can be uniquely determined from the potential difference ΔV _{kk + 1} .

The multi-level detection of differential signals (receiver Rx) in the above-described third embodiment is similar to that of the first embodiment, as shown in FIG. Can be used.

[0119] In this embodiment, possible values as a potential difference between the two data transmission lines L to be input to each reception device Rx is a four different _{-Ri O, 0, Ri O,} 2Ri O.
Therefore, to detect this, for example, three differential comparators shown in FIG. 5A are prepared, and ΔVref1, ΔVref2, and ΔVref3 may be given as the respective reference potential differences. _{However, -Ri O <ΔVref1 <0 <} ΔV
ref2 <so as to satisfy the relationship of Ri _O <ΔVref3 <2Ri _O, it is assumed to select the reference voltage .DELTA.Vref.
Thus, while observing the outputs Vout1 to Vout3, it is possible to determine which of the four levels the potential difference is.

For example, when the potential difference ΔVin = Vin1−Vin2 between the two data transmission lines L is Ri _O , Vout1 and Vout2 of the outputs of the differential comparator are “H”.
Vout3 outputs an “L” level. Also, the potential difference ΔVin = Vin between the two data transmission lines L
When 1−Vin2 is 0, among the outputs of the differential comparator,
Vout1 is at “H” level, and Vout2, Vout3
Outputs an “L” level.

Table 7 below shows the output Vo of each comparator.
The relationship between ut1 to Vout3 and the potential difference ΔVin between the input terminals detected thereby is shown together.

[0122]

[Table 7]

As described above, in the third embodiment, the received data can be restored with the potential difference between the input terminals of the receiving device by the transmitted data from the two transmitting devices. That is, since transmission data other than the transmission device of the pair is not required for restoring the reception data, the data transmission speed can be improved.

Further, in the third embodiment, each receiving device side end of the data transmission line is terminated via a resistor to detect a potential difference generated between data transmissions and obtain a detection signal. Although the case has been described as an example, the present invention is not limited to this, and it is also possible, for example, by detecting a current flowing through a data transmission line. (Fourth Embodiment) FIG. 10 schematically shows a configuration example of a semiconductor integrated circuit device according to a fourth embodiment of the present invention. In the invention of the fourth embodiment, a pair of transmitting devices Tx _k and Tx _{k + 1} share one data transmission line, and the transmitting device Tx _{k + 1} is connected to two data transmission lines. It has a configuration.

This semiconductor integrated circuit device has a transmission side LSI.
(First Integrated Circuit) Each transmitting device Tx of 11 and the receiving side L
SI12 (second integrated circuit) between the receiving device Rx and
The data transmission lines are connected via a plurality of data transmission lines L _{1 to} L _N , and one transmission line is shared by a pair (two transmission units) of transmission devices. That is, the transmitting devices Tx _k , Tx _{k + 1} and the receiving device Rx _{kk + 1} are connected via the data transmission lines L _k , L _{k + 1} , and the transmitting device Tx _k is connected to the data transmission line L _k The transmission device Tx _{k + 1} is connected to the data transmission lines L _k and L _{k
k + 1,} and connects the data transmission line L _k to the transmitting devices Tx _k , T
shared by _{xk + 1} .

The transmission side LSI 11 transmits the transmission data S ₁
For performing output to S _N by a differential signal, it is configured to have a plurality of transmission pad 13 at least two or more transmission device Tx, one end of the data transmission line L (transmission side) are connected ing. The transmission device Tx has a configuration similar to that of the first embodiment.

The receiving side LSI 12 transmits the transmission data S ₁
For the detection of to S _N by the differential signals, a plurality of receiving pads 15 at least one or more receiving devices Rx, the other end of the data transmission line L (receiving side) are respectively connected, and the received data It comprises a received data determination device 16 for determining D _{1 to} D _N.

The data transmission line L has one end connected to each transmission pad 13 and the other end connected to each reception pad 15.
, And a part thereof is shared between the paired transmission devices Tx. Further, each receiving device R of the data transmission line L
The x-side end is the characteristic impedance Z ₀ of the data transmission line L.
Are terminated via resistors 17 (R = Z ₀ ), respectively.

For example, the transmitting device Tx ₁ is connected to the data transmission line L ₁
Data Transmission via a transmission device Tx ₂ is transmitting data via the data transmission lines L ₁ and L _2. The receiving device Rx ₁₂ is connected to the transmitting device Tx via the data transmission lines L ₁ and L _2.
1, receives the data from the Tx _2. Also, the transmitting device Tx
₃ is a data transmission via a data transmission line L _3, the transmission device T
x ₄ is the data transmitted via the data transmission line L ₃ and L _4. Then, the receiving device Rx ₃₄ receives data from the transmitter Tx _3, Tx ₄ through the data transmission line L _3, L _4.
That is, two transmitting devices and one receiving device are connected via two data, and the two transmitting devices share one of the two data transmission lines.

In the case of the fourth embodiment, as in the third embodiment, it is not necessary to share a data transmission line for all adjacent transmitters, and a reference signal is generated on the transmitting LSI side. It is not necessary to have a generator for

As described above, the number of data transmission lines L in the fourth embodiment can be suppressed to the same number (N) as in the non-differential signal system. The number of receiving devices is
Since only one half is required for the transmitting device, the area of the receiving side can be reduced.

When considering a pair of transmitting devices Tx _k and Tx _{k + 1} , _one of the output terminals of the transmitting device Tx _k is desirably connected to the same power supply, if possible, for stability.

Hereinafter, a method of restoring the received data D according to the present embodiment will be described with reference to FIG. Here, the k-th transmitting device Tx _k and the (k + 1) -th transmitting device T
Consider the x k _{+ 1} pairs, so that the current i _O flowing to the data transmission line L _k when the transmission data S _k is "0", the transmission device Tx
_{When the} transmission data S _{k + 1} transmitted by _{k + 1} is “1”, the transmission data S _k is set so that the current i _O flows through the data transmission line L _{k.
When k + 1} is “0”, it is assumed that the current i _O is controlled to flow through the data transmission line L _{k + 1} . Also, the transmitting device Tx
_{When the} transmission data S _k transmitted by _k is “1”, control is not performed so that current flows through the data transmission line. When the transmission data _Sk is "1", a current may be drawn from the same power source, if possible, for stability elsewhere.

The sign of the received voltage detected by the receiver Rx _{kk + 1} is “positive” when the potential at the tip of the arrow shown between the receiving pads of the receiving LSI in FIG. 11 is higher than the potential at the base of the arrow. ”And“ negative ”when low.

The following four _{types of} transmission data S _k and S _{k + 1} transmitted from the transmission devices Tx _k and Tx _{k + 1} can be considered.

Transmission data S _k = “1”, transmission data S _{k + 1}
= “1”, the transmission device Tx _{k + 1} is connected to the data transmission line L _k
Current flows i _O by but, since the data transmission line L _{k + 1} no current flows, the potential difference ΔV _{kk + 1} = -Ri _O.

Transmission data S_k= “1”, transmission data S_{k + 1}
= "0", the data transmission line L_{k + 1}Has a transmitting device Tx
_{k + 1}The current i_OFlows, but the data transmission line L_kHas
Since no current flows, the potential difference ΔV_{kk + 1}= Ri_OBecomes

Transmission data S_k= “0”, transmission data S_{k + 1}
= “1”, the data transmission line L_kHas a transmitting device Tx_kYou
And Tx_{k + 1}Current 2i_OFlows but the data transmission line
L_{k +1}, No current flows, so the potential difference ΔV_{kk + 1}= -2
Ri_OBecomes

[0139] The transmission data S _k = "0", when the transmission data _{S k + 1 = "0"} , the current i _O flowing from the transmission device Tx _k to the data transmission line L _k, the data transmission line L _k since the ₊₁ current flows i _O by the transmission device Tx k _{+ 1,} the potential difference ΔV
_{kk + 1} = 0.

Therefore, the transmission data S _k , S _{k + 1} and the potential difference ΔV _{kk + 1} have a relationship as shown in Table 8 below.

[0141]

[Table 8]

Then, the received data judgment device 16
The received data _Dk and _{Dk + 1} are restored based on the potential difference obtained by the receiving device _{Rxkk + 1} . For example, a potential difference is detected ΔV _kk + 1 = -Ri _O if the reception data D _k =
“1”, D _{k + 1} = “1”. As described above, the detected potential difference ΔV _{kk + 1} has any one of four values, so that the reception data D _k and D _{k + 1} can be uniquely determined from the potential difference ΔV _{kk + 1} .

The multi-level detection of the differential signal (receiver Rx) in the above-described fourth embodiment is similar to that of the first embodiment, as shown in FIG. Can be used.

[0144] In this embodiment, taken as a potential difference obtained value between the two data transmission lines L to be input to each reception device Rx may _-2RiO, there are four of -Ri _O, 0, Ri O.
Therefore, to detect this, for example, three differential comparators as shown in FIG. 5A are prepared, and ΔVref1, ΔVref2, and ΔVref3 may be given as the respective reference potential differences. However, −2Rio <ΔVref1 <−
_{Ri O <ΔVref2 <0 <ΔVref3} < so as to satisfy the relationship of Ri _O, it is assumed to select the reference voltage .DELTA.Vref. Thus, while observing the outputs Vout1 to Vout3, it is possible to determine which of the four levels the potential difference is.

For example, when the potential difference ΔVin = Vin1−Vin2 between the two data transmission lines L is 0, Vout1 and Vout2 of the outputs of the differential comparator have the “H” level, and Vout3 has the “L” level. Output. Also, 2
Potential difference ΔVin between two data transmission lines L = Vin1−V
in2 is at a-Ri _O, of the output of the differential comparator,
Vout1 is at “H” level, and Vout2, Vout3
Outputs an “L” level.

Table 9 below shows the output Vo of each comparator.
The relationship between ut1 to Vout3 and the potential difference ΔVin between the input terminals detected thereby is shown together.

[0147]

[Table 9]

As described above, in the fourth embodiment, 2
With the transmission data from the two transmission devices, the reception data can be restored with the potential difference between the input terminals of the reception device. That is,
Since transmission data other than the transmission device of the pair is not required for restoring the reception data, the data transmission speed can be improved.

In the fourth embodiment, each receiving device side end of the data transmission line is terminated via a resistor to detect a potential difference generated between data transmissions and obtain a detection signal. Although the case has been described as an example, the present invention is not limited to this, and it is also possible to detect the current flowing through the data transmission line, for example. (Fifth Embodiment) FIG. 12 schematically shows a configuration example of a semiconductor integrated circuit device according to a fifth embodiment of the present invention. Here, a case will be described as an example where a detection signal is obtained by detecting a current flowing through a data transmission line.

For example, this semiconductor integrated circuit device comprises a transmitting LSI (first integrated circuit) 11 ′ and a receiving LSI
(Second integrated circuit) 12 'is connected via a plurality of data transmission lines L. Then, the transmission side LSI 1
Data transmission from 1 'to the receiving side LSI 12' is performed via a pair (two) of data transmission lines L '.

The transmission side LSI 11 ′ transmits the transmission data S
_At least two or more transmitting devices Tx ′ _{1 to} Tx ′ _N for performing the output of _{1 to SN} by differential signals, and a plurality of terminals to each of which one end (transmission side) of the data transmission line L is connected. It has a transmission pad 13 '.

As shown in FIG. 13, for example, the transmitting device Tx ′ has two output terminals 21a ′ ₋₁ and 21a connected to one / the other of the adjacent transmitting pads 13 ′.
The transmission data S (S _{1 to} S _N ) indicate the direction of the current ₋₂ , the constant current source 21 b ′, and the current i _O flowing through the constant current source 21 b ′ on each pair of the data transmission lines L. And a switch circuit 21c 'for switching in accordance with each other.

For example, when the transmission data S is "0" (see (a) in the figure), one (upper side) output terminal 21a
From the data transmission line L connected to ' _-1 (the lower side in the figure)
To the data transmission line L connected to the output terminal 21a'- ₂ of
When the current i _O flows in the direction indicated by the arrow in the figure, and when the transmission data S is “1” (see FIG. 3B), the data connected to the other output terminal 21′a- ₂ is output. The constant current source 21b is switched by the switch circuit 21c 'so that the current i _O flows from the transmission line L to the data transmission line L connected to the one output terminal 21'a _-1 in the direction shown by the arrow in the figure.
'Is switched.

In FIG. 12, the receiving side LSI
12 ', for the detection of transmission data S ₁ to S _N by a differential signal, at least two or more receiving apparatus Rx' ₁ ~Rx
' _N , a plurality of reception pads 15' to which the other end (reception side) of the data transmission line L 'is connected, and reception data D based on each output (detection signal) of the reception device Rx'. _It comprises a received data determination device 16 'for determining (uniquely restoring) _{1 to DN} .

The receiving devices Rx ′ are each constituted by, for example, an ammeter (not shown) for detecting the direction of the current i _O flowing through each pair of data transmission lines L.

Each of the data transmission lines L has one end connected to each transmission pad 13 ', the other end connected to each reception pad 15', and a part of which is connected to an adjacent transmission device T '.
x 'and between the adjacent receiving devices Rx'.

The end of the data transmission line L 'on the receiving device side is connected to, for example, the data transmitting line L' by the receiving device Rx '.
Are connected via appropriate impedances, for example, by matching with the input impedance.

Next, the reception data D in the above configuration
Will be described. It is assumed here that the current detected by the k-th receiving device Rx ′ _k is I _k, and the reception data D _k is determined from the current I _k .

The positive or negative of the received current is “positive” when the current i _O flows in the same direction as the arrow shown in FIG.
The opposite direction is defined as "negative".

For example, when the transmission data S _k is “1”, a current i _O flows from the data transmission line L ′ _{k + 1} to the data transmission line L ′ _k , so that I _k = i _O. On the other hand, when the transmission data S _k is “0”, the data transmission line L ′ _{k
Since the} current i _O flows through _{k + 1} , I _k = −i _O.

Therefore, if the signal detected by the receiving device Rx ′ _k is i _O , the received data determining device 16 ′ determines that D _k = “1”, and if −i _O , D _k =
It is determined to be “0”.

As described above, even in a device that performs data transmission depending on the direction of the current flowing through the pair of data transmission lines,
By sharing the data transmission lines between adjacent transmission devices and adjacent reception devices, the number of data transmission lines and the number of pads can be significantly reduced.

In each of the embodiments of the present invention, a case has been described where the transmission side LSI and the reception side LSI 12 are connected via a plurality of data transmission lines L. The means (receiving device) may be arranged on the same LSI and connected via a plurality of data transmission lines.

Of course, various modifications can be made without departing from the scope of the present invention.

[0165]

As described above in detail, according to the present invention, a differential signal system capable of operating at a high frequency is used, and the number of data transmission lines and the number of pads are reduced as compared with the conventional differential signal system. And a semiconductor integrated circuit device capable of increasing the amount of data that can be transmitted.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a semiconductor integrated circuit device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration example of a transmission device in the semiconductor integrated circuit device according to the first embodiment;

FIG. 3 is a schematic diagram of the semiconductor integrated circuit device, for illustrating a method of restoring received data D1 and D2 in the semiconductor integrated circuit device according to the first embodiment;

FIG. 4 is a schematic diagram of the semiconductor integrated circuit device shown for describing a method of restoring received data Dk in the semiconductor integrated circuit device according to the first embodiment;

FIG. 5 is an exemplary diagram showing a configuration example of a receiving device in the semiconductor integrated circuit device according to the first embodiment;

FIG. 6 is a schematic configuration diagram showing a semiconductor integrated circuit device according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram of a semiconductor integrated circuit device shown for describing a method of restoring received data Dk in the semiconductor integrated circuit device of the second embodiment.

FIG. 8 is a schematic configuration diagram showing a semiconductor integrated circuit device according to a third embodiment of the present invention.

FIG. 9 is a schematic diagram of a semiconductor integrated circuit device for illustrating a method of restoring received data Dk in the semiconductor integrated circuit device according to the third embodiment.

FIG. 10 is a schematic configuration diagram showing a semiconductor integrated circuit device according to a fourth embodiment of the present invention.

FIG. 11 is a schematic diagram of a semiconductor integrated circuit device shown for describing a method of restoring received data Dk in the semiconductor integrated circuit device of the fourth embodiment.

FIG. 12 is a schematic configuration diagram showing a semiconductor integrated circuit device according to a fifth embodiment of the present invention.

FIG. 13 is a schematic diagram illustrating a configuration example of a transmission device in a semiconductor integrated circuit device according to a fifth embodiment.

FIG. 14 is a schematic configuration diagram showing a conventional semiconductor integrated circuit device using a differential signaling method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Transmission LSI 12 ... Reception LSI 13 ... Transmission pad 14 ... Generation device 15 ... Reception pad 16 ... Reception data judgment device 17 ... Resistance Tx ... Transmission device Rx ... Reception device L ... Data transmission line S ... Transmission data D ... Received data i _O … Current

Continuing from the front page (72) Inventor Yasuo Unekawa 1F, Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa F-term in Toshiba Microelectronics Center Co., Ltd. 5K029 AA18 AA20 CC01 DD04 DD23 JJ06

Claims (9)

[Claims] A first integrated circuit having at least two or more transmitting devices for outputting data; a second integrated circuit having at least one or more receiving devices for performing detection of the data; A semiconductor integrated circuit device, comprising: a plurality of data transmission lines for connecting the transmission device and the reception device; wherein the data transmission line is shared between two transmission devices. 2. A first integrated circuit having first and second transmitting devices for outputting data, a second integrated circuit having a receiving device for detecting the data, and the first integrated circuit. Connecting a transmitting device and the receiving device,
And a second data transmission line connecting the first and second transmitting devices and the receiving device. 3. The semiconductor integrated circuit device according to claim 1, wherein data output from said first integrated circuit is sent out in parallel. 4. The method according to claim 1, wherein detecting the data in the second integrated circuit comprises:
4. The semiconductor integrated circuit device according to claim 3, wherein the operation is performed by a differential signaling method. 5. The reception device according to claim 1, wherein the second integrated circuit includes a reception data determination unit that determines data output from the transmission device based on an output from the reception device. 13. The semiconductor integrated circuit device according to claim 1. 6. The semiconductor integrated circuit device according to claim 5, further comprising reference signal generating means for generating a reference signal to be provided to said receiving device. 7. The receiving device according to claim 1, wherein the receiving device detects a potential difference between the connected data transmission lines.
13. The semiconductor integrated circuit device according to claim 1. 8. The semiconductor integrated circuit device according to claim 1, wherein said receiving device detects a direction of a flowing current. 9. A first integrated block having at least two or more transmitting means for outputting data; a second integrated block having at least one or more receiving means for detecting said data; A semiconductor integrated circuit device, comprising: a plurality of data transmission lines connecting the transmission unit and the reception unit; wherein the data transmission line is shared between the two transmission units.