JPH0420320B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a remote control IC used in a remote control method for controlling lighting equipment or other electrical appliances in general homes or buildings from a distance. It is related to.

(b) Conventional technology Conventional remote control ICs are designed for the purpose of channel selection and volume adjustment of television receivers, and because they have a relatively small number of addresses, they can be used to control a large number of lighting equipment in a building. It was unsuitable for applications with a large number of addresses, such as centralized control. In addition, the conventional
Since the IC is designed exclusively for remote control reception signal processing, there is a disadvantage in that it cannot be used for remote control transmission signal processing.

(c) Purpose of the Invention In view of the above points, the present invention proposes a remote control IC that is capable of controlling a large number of addresses and that can be used for processing transmitted signals of remote control as well as processing received signals of remote control. It is something to do.

(d) Structure of the Invention The IC of the present invention can be used in both transmission mode and reception mode, and in the transmission mode, addresses and function codes input in parallel from bidirectional terminals are shifted in parallel and serially out. The register converts the signal into a serial signal and outputs the signal to the output terminal.In receive mode, the received signal coming from the input terminal is stored in the serial-in/parallel-out shift register, and the comparator circuit converts the address code in the received signal. The basic operation is to compare the address code with the address code from the parallel-in/serial shift register, and when the address codes match, output the received signal to the bidirectional terminal. A reception mode in which a function code in a received signal is decoded by a function decoder and a control signal forming circuit generates a control signal according to the function decoder;
With respect to the address code comparison in the basic operation without performing the decoding and control signal generation, it is possible to select a reception mode in which only a part of the address code is compared, or a reception mode can be outputted without performing the address code comparison. did.

(e) Embodiments Before explaining the remote control IC of the present invention, a centralized monitoring system for lighting equipment will be explained.

FIG. 1 shows the configuration of a centralized lighting monitoring system. In this system, a controller called main unit 1 centrally controls a large number of lighting equipment and monitors their status. Note that the terminals 4a, 4 may also be controlled by the portable controller 2 or the central control unit 3.
b...4n control is possible. The terminal devices 4a, 4
b...4n are each composed of a transmitting circuit, a receiving circuit, a dimming circuit for the illumination devices 5a, 5b...5c, a pulse circuit for signal transmission, and the like. A unique address is assigned to the terminal device in advance, and when the address matches the address code transmitted from the master device 1, a signal is received. Then, dimming control (turning on, turning off, or switching to several levels of brightness) is performed in response to a command (function code) in the received signal. At the same time, terminal device 4 is connected to parent device 1.
It has a function of returning a signal (answer back signal) representing the status of a, 4b, . . . 4n.

The parent device 1 includes a transmitting circuit, a receiving circuit, a radio wave receiving circuit,
Consists of a display circuit, key input circuit, microcomputer, and pulse circuit. The master device 1 transmits a pulse signal containing an address code specifying an address specific to the terminal device and a function code instructing an operation, thereby controlling the terminal devices 4a, 4b, . . . , 4n. Also, the terminals 4a, 4b...4n receive answer back signals from the terminals 4a, 4b...4n.
Check the status of 4n. Furthermore, the master device 1 receives a signal sent by radio waves from the portable controller 2, and according to the signal, the terminal devices 4a, 4b...4n
can also be controlled. For example, one parent device is 32
It is possible to centrally control multiple terminals. Also, various terminal devices can be controlled using a microcomputer.
For example, by specifying the addresses of several terminal devices in the internal memory of a microcomputer and specifying the memory, it is possible to control several terminal devices at the same time. The portable controller 2 is composed of a radio wave transmitting circuit and a pulse circuit, and sends signals to the main device 1 via radio waves, and transmits signals to the terminal devices 4a and 4 through the main device 1.
b...Controls 4n. The central control unit 3 is composed of a transmitting circuit, a receiving circuit, a display circuit, a key input circuit, a microcomputer, and a pulse circuit, and centrally controls a number of terminal devices that cannot be controlled by the main device. The difference from the main unit 1 is that there are many terminals that can be monitored, and the signal from the portable controller 2 cannot be received because there is no radio wave receiving circuit.

The above-mentioned main unit 1, terminal units 4a, 4b...4n, and central control unit 3 are connected via a commercial AC power line 6, and signals exchanged between them are transmitted through the commercial AC power line 6. be done.

In FIG. 1, 7 is the first block. Reference numerals 8 and 9 are second and third blocks, respectively, which are constructed similarly to the first block 7.

By the way, in FIG. 1, the main device 1, the terminal device 4a,
4b...4n, the IC of the present invention which can be used for signal processing in the central control unit 3 and the portable controller 2 will be described.

Remote control IC10 shown in Figure 2
To explain each terminal, A ₀ to A ₉ are bidirectional terminals that can input and output address codes;
F ₀ to _{F 3} are second bidirectional terminals for inputting and outputting function codes, and OSC ₁ and OSC ₂ are clock oscillation terminals to which a 480 KHz crystal oscillator or ceramic oscillator is connected. M ₁ and M ₂ are reception mode setting terminals, and the content of the reception mode can be selected by a combination of their binary levels.
RST is a reset pin that initializes IC10.
SDI is an input terminal, ST is a start signal input terminal for instructing the start of transmission, SDO is an output terminal for a transmission signal, DR indicates that transmission data has been received, and the two-way terminals A ₀ to A ₉ , F ₀ ~ _F3 is the terminal that indicates that it is in the output state, RC is the output terminal for external relay control, TC is the control signal output terminal for the external dimmer circuit triack, and AC is the zero-cross detection pulse input terminal for the commercial power supply voltage. . Next IC1
Inside the 0, 11 is a timing generation circuit that generates various clock pulses necessary for internal operations, and 13 is a serial circuit that stores the 21-bit serial encoded reception signal transmitted from the SDI terminal through the input circuit 12. It is an in-parallel out shift register. Reference numeral 14 denotes a comparison circuit that compares a signal stored in the serial-in/parallel-out register 13 with a signal stored in a parallel-in/serial-out register 18, which will be described later, for both address codes. The comparison circuit 14 also compares the same signal input twice to the SDI terminal, that is, compares the first and second received signals. A function decoder 15 decodes a 4-bit function code in a received signal, and supplies its output to a relay control flip-flop 17 and a dimming circuit 16. The dimmer circuit 16 is a circuit that generates a pulse that is delayed by a certain period of time with respect to the zero-crossing pulse of the commercial AC power input from the AC terminal, and the pulse is output from the TC terminal. The delay time of the pulse is determined by the output of the function decoder 15. The relay control flip-flop 17 is a circuit that outputs "1" or "0" according to the output from the function decoder 15, and its output is
Output from the RC terminal. The parallel-in/serial-out shift register 18 is a circuit for storing transmission signals, and is activated by the operation of the timing generation circuit 11 in response to a transmission start signal applied to the ST terminal, and outputs a serial encoded signal. 19 outputs a parity bit of 1 to the output of the parallel-in/serial-out shift register 18.
This is a parity generation circuit that adds bits. 20 is a circuit that modulates the transmission signal from the parallel-in/serial-out shift register 18 at 120 KHz, and this output is outputted from the SDO terminal. Note that the modulation circuit 20 does not necessarily have to be provided in the IC 10, and may be an external circuit.

() Transmission operation Figure 3 shows the time chart of the transmission signal of IC10. After the internal circuit is reset by the reset signal given to the RST terminal [Fig. 3 A], when a signal with a pulse width of at least 18 mS [Fig. 3 B] is applied to the ST terminal, the timing generation circuit 11 is activated. drive Then, the parallel data set in the bidirectional terminals A ₀ to A ₉ and F ₀ to F ₃ is read into the parallel-in/serial-out shift register 18 and converted to serial data [Figure 3 C]. A 5-bit header and a parity bit P generated by the parity generation circuit 19 are added to the converted serial data (FIG. 3D).

Therefore, the sending data is header 5 “11001”
It consists of a total of 20 bits: 10 bits for address code, 4 bits for function code, and 1 bit for parity.

If 1 bit is 250 μS, the transmitted data is 5
mS and is output repeatedly twice [Figure 3 D]. This transmission data is input to the modulation circuit 20, modulated at 120KHz, and output to the SDO terminal.
Note that during the transmission operation, the SDI terminal is prohibited from inputting and does not receive its own transmission data.

() Reception operation Figure 4 shows a time chart during reception operation.

The basic operation in the case of reception is that when received data (FIG. 4B) is input to the SDI terminal, the signal is input to the serial-in/parallel-out shift register 13 through the input circuit 12. At this time,
Input circuit 12 drives timing generation circuit 11 . A timing generation circuit 11 generates various timing signals for performing reception operations. Next, when the second reception data (see FIG. 4B) is input to the SDI terminal, it is input to the serial in/parallel out shift register 13 in the same way as the previous time. At this time, check whether the header is “11001” and
A comparison circuit 14 compares the data of the first time and the data of the second time to see if they are the same. At this time, bidirectional terminals _A0 to _A9 are set to input state.
The data set in the A ₀ to _{A 9} terminals is input to the comparison circuit 14 through the parallel-in/serial-out shift register 18 and compared with the address code in the received data. Comparator circuit 14 also performs a parity check.

_{[ _ _ _} See Figure 4 C]. At this time, DR (data ready)
The terminal becomes “1” [Fig. 4 D], and the bidirectional terminal A ₀
~ _A9 and _F0 ~ _F3 are in the output state.
Also, when the DR pin is “1”, SDI input is prohibited,
Even if a signal is input to SDI in this state, it will not be accepted and the previous data will be retained. When "1" is input to the RST (reset) terminal, the inhibited state of the SDI terminal is canceled, the DR terminal becomes "0", and the bidirectional terminal also becomes the input state again. In addition, during reception operation ST
Input to the (start) terminal is prohibited.

The above transmission operation and basic reception operation are the first
Central control unit 3, main device 1, terminal devices 4a, 4b in the figure
...4n, IC regardless of portable controller 2
10 performs substantially the same operation.

However, regarding reception operations, slightly different reception operations are performed for the terminal device, parent device, and central control unit. Therefore, these different parts will be explained next.

() 1st reception mode (terminal device) Set the M ₁ and M ₂ terminals of IC10 to “1” and “0”, respectively. Following the basic receiving operation described in (), the function decoder 15 decodes the command represented by the function code of the received data, and the result is transmitted to the dimming circuit 16 and relay control flip-flop 17. As described above, the dimmer circuit 16 generates the fifth pulse which is delayed by a certain period of time according to the function data with respect to the zero-cross detection pulse [Fig. 5 b] of the commercial power supply voltage input to the AC terminal [Fig. 5 a]. Figures d-i
The delay time can be controlled in six stages using a function code. It also outputs a lighting pulse (FIG. 5c) and a light-off signal (FIG. 5j).

Incidentally, a time chart in the first reception mode is shown in FIG. As a basic receiving operation, when the received data from the SDI terminal [Fig. 6 A] is given and the address matching and other predetermined data determination etc. are completed, the bidirectional terminals A ₀ to A ₉ are input as shown in Fig. 6 B. ,F ₀
~Change the output state of _F3 from the input state for about 250 μS and set the DR terminal to “1” for about 125 μS [Figure 6 C],
This indicates that the bidirectional terminal is in an output state. If "0" is input to the ST terminal, answer back signal transmission will begin as soon as the reception operation is completed. Note that if "1" is input to the ST terminal, no answer call is performed. 6th
Figure E shows the transmitted data.

() 2nd reception mode (master unit) When the M ₁ and M ₂ terminals are set to “0” and “1” respectively, in addition to the basic reception operation described above, the reception address code input to the SDI terminal and A ₀ to A Only the upper 5 bits are compared with the address code set to ₉ , and if they match, the data is considered receivable.In addition, the operation commanded by the function code in the received data is not performed. The received data F ₀ to F ₃ have no relation to the RC and TC terminals.The RC terminal always outputs "0", the TC terminal outputs a 480KHz clock pulse, and "1" is input to the AC terminal.

() 3rd reception mode (central control unit) When the _M1 and _M2 terminals are set to “1” and “1” respectively, no matter what address complex the receive data input to the SDI terminal has, it becomes receivable data. I reckon. In other words, it becomes possible to receive data from all addresses. Processing of function codes in received data, output from RC and TC terminals, etc. are exactly the same as in the second reception mode.

(F) Effects of the Invention Since the IC of the present invention can process received signals and transmitted signals, the same IC can be used as the above-mentioned parent device, terminal device, central control unit, and portable controller. There is. Furthermore, the transmitted and received signals are encoded and have the advantage of containing a large number of channels.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a centralized monitoring system for certification equipment in which the IC of the present invention can be used. Figure 2 shows a remote control IC that implements the present invention.
FIG. FIG. 3, FIG. 4, FIG. 5, and FIG. 6 are all explanatory diagrams of the operation of FIG. 2. SDI...Input terminal, SDO...Output terminal, A ₀ ~
A ₉ , F ₀ to F ₃ ... Bidirectional terminal, TC, RC ... Control signal output terminal, M ₁ , M ₂ ... Reception mode selection terminal, 11 ... Timing generation circuit, 13 ... Serial in parallel Out shift register, 15
...Function decoder, 16...Dimmer circuit (control signal forming circuit), 17...Relay control flip-flop (control signal forming circuit), 18...Parallel in/serial out shift register.

Claims (1)

[Claims] 1 An input terminal to which an encoded reception signal is given, an output terminal to output a transmission signal, a bidirectional terminal to which address codes and function codes can be input and output, a control signal output terminal, and a transmission mode drive terminal. , a reception mode selection terminal, a timing generation circuit that generates various clock pulses necessary for internal operation of the IC, a serial-in/parallel-out shift register for storing the received signal, and a code output from the bidirectional terminal. a parallel-in/serial-out shift register for storing data; a function decoder for decoding a function code in the received signal; and a function decoder for generating a control signal according to the output of the function decoder. and a control signal forming circuit to be applied to the output terminal, and in the transmission mode, the address and function code inputted from the bidirectional terminal are converted into a serial signal by the parallel-in/serial-out shift register, and the signal is sent to the output terminal. In receive mode, the received signal coming from the input terminal is stored in a serial-in/parallel-out shift register, and a comparison circuit compares the address code in the received signal with the address code from the parallel-in/serial shift register. The basic operation is to output the received signal to the bidirectional terminal when the address codes match, and depending on the settings of the receive mode selection terminal, the function in the received signal Comparison of address codes in the reception mode in which a code is decoded by a function decoder and a control signal is generated from a control signal forming circuit, and in the basic operation without decoding by the function decoder and generation of the control signal. A remote control IC characterized in that a reception mode can be selected in which only a part of address codes is compared or a reception signal can be output without comparing address codes.