JPH0410091A - Device for detecting load/unload of memory cartridge - Google Patents

Abstract

PURPOSE:To prevent a data stored in a memory cartridge from being destroyed by supplying power to the memory cartridge after detecting that the memory cartridge is securely loaded and the connecting state is stabilized when inserting the memory cartridge to a collector. CONSTITUTION:A load-unload detecting means 11 is provided to detect that a memory cartridge 2 is loaded/unloaded on/from a collector 9, and a control means 4 is provided to read a load/unload detection signal. The insertion of the memory cartridge is detected after the lapse of first filtering time having a prescribed length so that the load/unload detecting means 11 can instantaneously remove noise, and the unload of the memory cartridge is detected after the lapse of second filtering time shorter than the first filtering time. Thus, the power is supplied to the memory cartridge 2 for the first time after detecting that the memory cartridge 2 is securely inserted and that the connecting state with a collector terminal 9 is stabilized, and the destruction or the like of the data can be prevented.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an insertion/removal detection device, and particularly to a power supply that supplies a predetermined power when a memory cartridge storing control information is inserted or removed. Regarding equipment.

(Prior Art) For example, there is a printer device that can set printing conditions and output printout by installing a memory cartridge that stores information regarding printout into a printer controller.

This printer device stores fonts to be used for printing in a memory cartridge, and installs the memory cartridge into a printer controller having a power supply device to input font information. Can be printed out.

Therefore, in the printer device, by replacing and installing several types of memory cartridges that individually store different fonts, several types of printing conditions can be immediately set and output in the printer controller. However, in this printer device, as soon as it is detected that the memory cartridge is inserted into the connector, power is supplied to the memory cartridge.

(Problems to be Solved by the Invention) As described above, the printer device is supplied with power when a memory cartridge is detected even if it is in the middle of being inserted. Therefore, the contacts between the memory cartridge and the connector terminal are connected unstablely, and chattering occurs. The memory cartridge has a built-in battery,
If the device is equipped with a RAM memory with data backed up, the data will be destroyed when a chattering TzR is introduced.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an insertion/removal detection device that can supply power to the memory cartridge by detecting that the memory cartridge is securely inserted and the connection state with the connector terminal is stable.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a memory cartridge storing various control information, an insertion/removal detection means for detecting that the memory cartridge is inserted into or removed from a connector, and a a control means for reading an insertion/extraction detection signal from an insertion/extraction detection means; the insertion/extraction detection means detects the insertion of the memory cartridge with a first filtering time of a predetermined length capable of removing instantaneous noise; It is possible to provide a memory cartridge insertion/removal detection device characterized in that the removal/removal detection of the memory cartridge is performed with a second filtering time shorter than the second filtering time.

(Function) According to the above configuration, the insertion/removal detection device of the present invention has the following features:
Power can be supplied to the memory cartridge by detecting that the memory cartridge is securely inserted and the connection state with the connector terminal is stable.

(Embodiment) FIG. 1 is a block diagram showing the configuration of a printer controller as an embodiment of the power supply device of the present invention.

This printer controller is a printer controller main control unit (hereinafter abbreviated as main control unit) that receives encoded data transferred from a host computer (not shown) and performs control to print image information on paper. 1, a memory cartridge 2 that can be inserted into and removed from the printer body and stores information data such as fonts, and a memory cartridge driver (hereinafter referred to as MCD) that writes information data in the memory cartridge 2. (omitted) consists of 3.

The main control unit 1 reads coded data received from the host computer and prints image information on paper. and when the MCD 3 is in an abnormal state, a signal to be asserted (which will be described later) is detected.
A preset command is transferred to the MCD 3. Said M
The CD3 executes processing according to the instruction.

Next, the configuration of the MCD 3 is such that a communication control port 6 is provided between the MCD control section 4 and the main control section 1 by an address/data busler that controls Ilo and transfers data.
and communication data port 7 and service request signal output port 8 are connected to each other.

Further, a cartridge data/address port 10, a cartridge insertion/removal detection port 11, a cartridge power supply port 12, and a cartridge type detection port 13 are connected between the cartridge connector 9 and the MCD control section 4 by the address/data bus 5. each connected.

The MCD control unit 4 controls communication with the main control unit 1,
Analysis and execution of commands from the main control unit 1, detection of insertion and removal of the memory cartridge 2, and memory cartridge 2
Controls on/off of power to the

Next, the communication control port 6 is a means for executing a handshake accompanying data transmission and reception in data communication with the main control unit 1, and is a means for executing handshaking associated with data transmission and reception, and is a
Controlled by U4a (Figure 3).

The communication data port 7 is a data transmitting/receiving means for data communication with the main control section 1. In other words, what the MCD 3 receives from the main control unit 1 is the command (
What the MCD 3 sends to the main control unit 1 are data in the memory cartridge 2 and status indicating the status of the MCD 3.

The CPU 4a inputs the command/data from the main control section 1 or outputs the data/status to the main control section 1 by accessing the communication control port 6 and the communication data port 7. can be executed.

Further, the service request signal output port 8 is connected to the main control unit 1.
means for transmitting the service request signal to. The cartridge data/address port 10 is an input/output means for data transfer between the memory cartridge 2, which can be inserted and removed, and the CPU 4a. and said CP
When U4a writes data received from the main control unit 1 to the memory cartridge 2 or transmits data read from the memory cartridge 2 to the main control unit 1, the service request signal output port 8 is used. Select.

The cartridge insertion/removal detection port 33 is means for detecting insertion/removal of the memory cartridge 2. The cartridge power supply port 12 is means for supplying power to the memory cartridge 2. The cartridge type detection port 13 detects the type of memory medium (ROM4b, RAM4b, etc.) built into the memory cartridge 2.
c, etc.).

Further, the cartridge connector 9 is a connector into which the memory cartridge 2 is inserted.

FIG. 2 shows the data storage structure of the memory cartridge 2. As shown in FIG.

The memory cartridge 2 is a removable cartridge that has a built-in memory 2a made of RAM or ROM, and stores fonts and other information as data.
A number (FONT) is stored. That is, "F" of code "46" is stored in the first address AD, and codes r51hJ, r4ehJ, r5 are sequentially stored in the next address.
4hJ is stored.

FIG. 3 shows the configuration of the MCD control section 4 and will be explained.

The configuration of the MCD control section 4 is based on the program RO described later.
A CPU 4a controls the MCD 3 according to a program stored in the M4b;
Program R that stores a program for controlling 3.
OM4b and a work RAM4 that secures an area used by the program stored in the program ROM4b.
C, each of which is connected to the address/data bus 5 and transfers data to its respective port.

Next, FIG. 4 shows the structure of the work RAM 4C and will be described in detail.

The file t+Il'r of the work RAM 4C consists of a startup timer (CDT IMER) 4d, a power supply stability timer (VDT IMER) 4e, and an insertion/removal storage means (CARD).
STTS) 4 f, ID confirmation storage means (CARDIDS)
TTS) 4g, memory medium storage means (MEMOSTTS)
) 4h, power supply judgment storage means (VCCREQ) 4i
, read/write determination storage means (VCCRDY) 4j, storage storage means (CNCTFLAG) 4k, and ID registration storage means (IDNUM) 4m.

The startup timer (CDTIMER) 4d is
4a is a counting means for detecting the start of insertion of the memory cartridge 2 by reading the cartridge insertion/removal detection port 11 and waiting for the connection state to become stable. The activation timer 4d starts activation after the CPU 4a detects the start of insertion of the memory cartridge 2. If the connection state does not change until the counting means counts 500111 seconds, it is determined that the connection state is stable, and the power supply determination storage means 41 is asserted to supply power to the memory cartridge 2. Here, the above-mentioned assertion means to enable, and invalidating means to negate.

The power supply stability tie v (VDT IMER) 4 e is
The CPU 4a is a counting means that waits until the voltage becomes stable after supplying power to the memory cartridge. The power supply stability timer 4e starts activation when the CPU 4a detects the assertion of the power supply determination storage means 41. This counting means asserts the read/write determination storage means 4j after 1 o o m5ec, and puts the memory cartridge 2 in a state where the CPU 4a can correctly read and write.

The insertion/removal storage means (CARDSTTS) 4f is a storage means for the CP04g to store the insertion/removal state of the memory cartridge 2 into the cartridge connector 9, and is asserted when the memory cartridge 2 is inserted and asserted when the memory cartridge is removed. Negate.

The ID confirmation storage means (CARD I DSTTS) 4
g is a storage means for the CP04a to memorize whether the ID stored in the memory cartridge 2 inserted into the cartridge connector 9 is correct, and asserts if the ID is correct; Incorrect I
If D, negate.

The memory medium storage means (MEMOSTTS) 4h is
The CPU 4a is a storage means for storing the type of memory medium (ROM, RAM, etc.) in the memory cartridge 2 inserted into the cartridge connector 9, and the CPU 4a stores the value of the cartridge type detection port 13. is memorized.

The power supply determination storage means (VCCREQ) 41 is a storage means that the CPU 4a refers to in order to determine whether or not to supply power to the memory cartridge 2.

The activation timer 4d asserts when counting 500 IIlsec, and negates when reading and writing to the memory cartridge 2 is completed or when the memory cartridge 2 is removed from the cartridge connector 9. The CPU 4a outputs the value stored in this storage means to the cartridge power supply port 12, and when this storage means is asserted, the power is turned on, and when this storage means is negated, the power is turned off. Make it.

The read/write determination storage unit (VCCRDY) 4j is a storage unit that the CPU 4a refers to in order to determine whether to start reading or writing to the memory cartridge 2. The power supply stability timer 4e asserts this storage means when it counts 100 m5ec. When this storage means is asserted, it is assumed that the supplied power supply voltage is stabilized, and the memory cartridge 2 can be accessed. This storage means is negated together with the negation of the power supply determination storage means 41.

FIGS. 5(a) to 5(d) show the storage means (CNCT).
The configuration diagram of FLAG) 4 is shown.

The storage storage means (CNCTFLAG) 4 stores the C
PU4a is always connected to the cartridge insertion/removal detection port 1.
1 (not shown) every 5 m5ec and stores the value. The storage area is three areas (CNCTFLAGI.

CNCTFLAG2. CNCTFLAG3. Below C1,
C2 and C3), and the value of these areas is 51.
It moves every 11 seconds.

In this movement, first, the value stored in area C2 is
3 (arrow A) L, then the value stored in area C1 moves to area C2 (arrow B).

Further, the value read from the cartridge insertion/removal detection port 11 is stored in the area C1 (arrow C).

If two or more of the three areas are asserted, insertion is detected, and two or more of the three areas are asserted.
If more than 2 areas have been negated, it is detected that the area has been negated.

That is, as shown in FIG. 5(b), when the nth read value (d a t e) is stored, the area C1
date(n) is stored in area C2, date(n-1) is stored in area C3, and date(n-2) is stored in area C3.

After this, when 5 m5ec has elapsed, the values move from one area to another, and when the n+1th storage is performed as shown in FIG.
date(n) is stored in area c3, and date(n-1) is stored in area c3.

After a further lapse of 5 II lsec, each value moves through the area, and as shown in FIG. 5(d), the n+2th storage is performed, and data (n+2) is stored in the area C1.

da te (n+1) in area C2, d in area c3
ate(n) will be stored.

FIG. 6 shows the configuration of the ID registration storage means (IDNUM) 4m.

The ID registration storage means 4m is a storage means that the CPU 4a refers to when setting the ID confirmation storage means 4g, and the values stored here and the first address of the memory cartridge 2 are stored in the ID registration storage means 4m. The IDs are compared, and when they are equal, the ID confirmation storage means 4g is asserted.

Further, this storage means can register a plurality of IDs by an ID registration command from the main control unit 1.

That is, the ID registration storage means 4m has, for example, four areas (IDNUMI, IDNUM2.IDN0M3 and
DNUM4. 11, 12, 13, and I4). Then, in the area 11, “FON”r” and in the area 2, “FORMAT” are the IDs of the main control unit 1.
Each is stored by a registration command. Furthermore, area 13 and area I4 are undefined.

Next, FIG. 7 shows an example of the configuration of the cartridge insertion/removal detection port 11.

A memory cartridge 2 whose one end is electrically grounded is attached to a cartridge connector 9.

The cartridge connector 9 is connected to the input end of an inverter 11a and the other end of a resistor 11b to which a voltage of 5V is applied to one end. Output end 1 of the inverter 11a
1c is connected to the MCD control section 4 and outputs a detection signal whether the memory cartridge 2 is attached to the cartridge connector 9 or not.

Further, FIG. 8 shows an example of the configuration of the cartridge power supply port 12.

A memory cartridge 2 having one end connected to a power supply VCC is attached to a cartridge connector 9. The cartridge connector 9 is connected to one terminal of a switch S1, the other terminal of which is applied to 5. Said switch S
1, a contact terminal connects to the MCD control unit 4, and power is supplied to the memory cartridge 2 by closing the contact.

Next, the operation of the printer controller of this embodiment configured as above will be explained. The operations of this printer controller can be roughly divided into four processing operations. The four processes are insertion/removal detection processing,
These include power supply processing, ID registration/check processing, and communication processing. First, the overall operation (cartridge read operation)
After explaining this, the operation of each process will be explained.

FIG. 9 is a flowchart showing the cartridge read operation when the memory cartridge 2 is attached to the cartridge connector 9.

Furthermore, FIG. 10 is a timing chart corresponding to the operation of the cartridge read, and the portions corresponding to the steps of the flowchart are indicated by Sl.

S2... is shown together.

It is determined whether the memory cartridge 2 is installed (step Sl). When installed (Y), a detection signal is detected in the insertion/removal storage means 4f.

When not attached (N), the standby state is maintained.

Next, after the detection signal is detected, the activation timer 4d counts 500 m5ec and determines whether the attachment is confirmed (step S2). If the installation is not confirmed (N
) waits until the activation timer 4d is reset and the detection signal is input again. If the installation is confirmed (Y), the power supply (VCC) is connected to the memory cartridge 2.
(step S3). Next, after power is supplied, the power stabilization timer 4e counts 100 m5ec and determines whether the power has been stabilized (step S4). When the power supply is not stabilized (N), the power supply stability timer 4e is reset and waits until stability is determined again. When the power supply is stable (Y), the ID is read from the memory cartridge 2 (step S5). After reading the ID number from the memory cartridge 2, the power supply is turned off (step S6).

Next, determine whether the read ID number is correct (
Step S7). When the above ID number is incorrect (N
) returns to step S1 and waits until the memory cartridge with the correct ID number is installed again. When the ID number is correct (Y,), the ID confirmation storage means (
CARDIDSTTS)4g is asserted (step S8).

Next, a service request signal is transmitted from the MCD control section 4 to the printer controller main control section (hereinafter referred to as main control section) 1 (step S9). Then, the cartridge sense command from the main control section 1 is transmitted to the communication data port 7, and the MCD control section 4 determines whether or not it has been received (step 510). If the cartridge sense command is not received (N), it waits until it is received. When the cartridge sense command is received (Y), the MCD control section 4
An ID confirmation signal is transmitted to (step 511). After confirming whether the ID number is correct, the main control unit 1 transmits a read command to the communication data boat 7, and the MCD control unit 4 determines whether or not it has been received (step 512). If it is not received (N), it waits until the reception is confirmed. When the reception is made (Y), the power (V CC) is supplied to the memory cartridge 2 (step 813). Next, after the power is supplied, the power stability timer 4e counts 100 m5ec and determines whether the power has been stabilized (step 514). When the power supply is not stabilized (N), the power supply stability timer 4e is reset and waits until stability is determined again. When the power supply is stable (Y), data is read from the memory cartridge 2 (step 515) and transmitted to the main controller 1 (step 516). The main control unit 1 that has received the data sends a cancel command to the MC.
It is transmitted to the D control unit 4 (step 517). It is determined whether the cancel command has been received by the communication data porter 7 (step 518). The above cancellation/
If no command has been received (N), the process returns to step S15 and data is read from the memory cartridge 2 again. If the cancel command has been received (Y), the power supply to the memory cartridge 2 is stopped (step 519).

As described above, power is not supplied to the memory cartridge 2 of the printer controller of this embodiment except when reading and writing ID numbers and data to the memory cartridge 2.

Furthermore, although the overall operation of the printer controller has been described, the operations of the aforementioned insertion/removal detection processing, power supply processing, ID registration/check processing, and communication processing will be explained.

First, the insertion/removal detection process for the memory cartridge will be explained. , the CPU 4a in the MCD control unit 4, every 5 m5ec,
The value of storage storage means CNCTFLAGI (hereinafter referred to as area C1) is moved to CNCTFLAG2 (hereinafter referred to as area C2), and the value of CNCTFLAG2 is transferred to CNCT
Move to FLAG3 (hereinafter referred to as area C3). Further, the value of the cartridge insertion/removal detection port 11 is stored in the area C1. Then, referring to area C1, area C2, and area C3, the combination is (area CI, area C2, area C3) - (0, 1, 1) OR (1, 0, 1) OR (1, 1 ,0
)OR(1,1,1), it is determined that the insertion of the memory cartridge 2 has started, and the insertion/removal storage means (CARDSTTS) 4f indicating the mounting state of the memory cartridge 2 is asserted. Also (area CI, area C2, area C3) 4 (0, 0, 0) OR (0, 0, 1) OR (0, 1, 0
)OR(1,0,0), it is determined that the memory cartridge 2 has been removed, and the insertion/removal storage means 4f is negated.

However, if one reading out of three readings every 5 m5ec is different from the others, that one reading is considered to be noise unrelated to the insertion/removal operation of the memory cartridge 2.

FIG. 11 shows an embodiment of the insertion/extraction detection process, showing the cartridge insertion/extraction detection port 11, the storage storage means (CNCTFLAG) 4k for each 5IIISeC, and the insertion/extraction storage means 4f.
This shows the relationship between the loading timing and the loading timing.

Part A indicating a change in the cartridge insertion/extraction detection port 11 is noise unrelated to the insertion/extraction of the memory cartridge 2, and the insertion/extraction storage means 4f is negated.

Similarly, in part B, the memory cartridge 2 is inserted and the contact points between the memory cartridge 2 and the cartridge connector 9 are disturbed. Therefore, the insertion/extraction storage means 4f is still negated.

Similarly, in part C, although the contact point of the memory cartridge 2 is moving, the contact state is stable, so the storage storage means 4k becomes (1, 1, 0) (0, 1, 1),
The insertion/extraction storage means 4f asserts.

However, since the contact point is still moving, the contact state becomes unstable again. As a result, the storage storage means 4k becomes (0, 0, 1) (1, 0° 1), and the insertion/extraction storage means 4f is negated.

In the portion E, the movement of the contact point has been completed and the contact state has been established, so the storage storage means 4k is (1, 1,
0) (1, 1,, 1), and is asserted in the insertion/extraction storage means 4.

In part F, the memory cartridge 2 is removed from the cartridge connector 9, and the insertion/extraction storage means 4f is negated.

Even if the value of the cartridge insertion/removal detection port 11 is irregular in this way, the insertion/removal storage means 4f is determined according to the above-mentioned rules, and this is referred to as a flag indicating the mounting state of the memory cartridge 2. By removing the one-off noise around m5ec, insertion and removal of the memory cartridge 2 can be detected more reliably.

Next, the power supply process will be explained.

Even when the memory cartridge 2 starts to be inserted into the cartridge connector 9, the connection state becomes unstable while the contact point is moving, as shown in the above-mentioned insertion/removal detection process. Therefore, if power is supplied immediately after insertion has started, the memory cartridge 2 may be destroyed or incorrect data may be read/written. That is, even if the memory cartridge 2 is inserted into the insertion/removal storage means 4f, power cannot be immediately supplied to the memory cartridge 2.

Therefore, the power is supplied after the insertion/extraction storage means 4f continues to be asserted for a certain period of time as described in the above-mentioned insertion/extraction detection process.

FIG. 12 shows a time chart of one embodiment of the power supply processing and will be described in detail.

When the insertion of the memory cartridge 2 is started, that is, when the insertion/removal storage means (CARDSTTS) 4f is asserted (T1), the activation timer (CDT IMER) is activated.
4 Start up d. The activation timer 4d is 500m
When there is no change in the insertion/removal storage means 4f until 5ec is counted (T2), it is determined that the insertion of the memory cartridge 2 is confirmed.

That is, when the insertion/removal storage means 4f is asserted (T1
), the activation timer 4d is activated.

However, the insertion/removal storage means 4f may be negated until the activation timer 4d counts 5001 seconds or more (T2). .

That is, while the memory cartridge 2 is being inserted, the contact point with the cartridge connector 9 moves and the contact state is unstable. When the contact point is separated, the activation timer 4d
is reset, but when the insertion/removal storage means 4f is asserted again, the activation timer 4d is restarted.

When the startup timer 4d counts 50011ISeC (T3), the power supply determination storage means (VCC
REQ)4i is asserted (T4), a power supply signal is outputted to the cartridge power supply port 12 (T5), and power supply to the memory cartridge 2 is started (T6).

Further, even if power is started to be supplied to the memory cartridge 2, it is necessary to wait until the voltage becomes stable (T7) before reading or writing. In other words, the power supply determination storage means 41
(asserted) (T5), power supply stability tie 7 (V
DT IMER) 4 e started and 100 m5ec
After counting (T7), read/write judgment storage means (VC
CRDY)4j is asserted (T8) to make the memory cartridge 2 readable and writable.

In this way, by stabilizing the connection state of the memory cartridge 2 and waiting for the voltage to stabilize after power is supplied, the memory cartridge 2 can be protected and erroneous data reading and writing can be prevented.

Next, ID registration/check processing will be explained.

When read/write determination storage means (vCCRDY) 4j is asserted, it is necessary to check whether or not the memory cartridge 2 has a correct identification (hereinafter referred to as ID) number registered.

For example, when using a memory cartridge 2 that must store character data used in a printer controller, the ID number is stored in the ID registration storage means 4m shown in FIG.
ASCII code: 46h, 51h, 4ch, 54h
), and in case you use memory cartridge 2 as a format memory, use the FORM
AT” (ASCII: 7-do, 48h, 4f'h
, 52h, 4dh, 41h, 54h) are stored as ID numbers in the second area I2 of the ID registration storage means 4m.

As a result, this printer controller can use the memory cartridge 2 in which the above two types of ID numbers are registered. Note that the ID registration is performed by an ID registration command from the main control section 1 at the time of initial setting of the printer controller when the printer main body is turned on.

An explanation will be given with reference to a flowchart shown in FIG. 13 showing the processing operation of ID registration/check processing.

When the memory cartridge 2 is attached to the cartridge connector 9, it is first determined whether the first ID number is registered in the first area 11 of the ID registration storage means 4m of the work RAM 4c (step 520). 1st ID
When the number is unregistered and undefined (N), the ID confirmation storage means (CARDIDSTTS) 4g is negated (step 521).

Further, when the 11th D number is defined (Y), it is determined whether the same ID number is defined in the start address AD of the memory 7a of the memory cartridge 2 (step 52).
2).

In step S22, when the same ID number as the first area 11 of the ID registration storage means 4m is defined in the memory cartridge 2 (Y), the ID confirmation storage means (CAR
D I DSTTS)4 g is asserted (step 823).

However, if the same ID number is not defined (N), then it is determined whether the ID number is registered in the second area I2 of the ID registration storage means 4m (step 524). When the ID number is not registered and defined in the second area I2 (
N) means that the ID confirmation storage means 4g is negated (
step 823).

Also, when the ID number is defined in the second area ■2 (Y)
I in the same second area I2 in the memory cartridge 2
Determine whether the D number is defined (step 525)
. In this step S25, when it is determined that the same ID number is defined in the memory cartridge 2 (Y), the ID confirmation storage means (CARDIDSTTS) 4g
is asserted (step 823).

Thereafter, the third and fourth ID numbers are also determined in the same manner (steps S26 to 529).

The above ID registration/check process is performed if the ID number of the installed memory cartridge 2 is equal to one of the plurality of ID numbers registered in advance in the ID registration storage means 4m.
The ID confirmation storage means 4g assumes that the ID number is correct and that it can be read from the memory cartridge.

At this time, in order to determine that the ID number is correct,
The memory cartridge 2 has an ID at the top address.
'FONT' with the same ID number as the ID@ number stored in the registration storage means 4m (46h in ASCII code)
, 511+, 4eh, 54h) or FORM
AT' (ascii: I-do, 46h, 4rh,
52h, 4dh, 41h, 54h) must be stored.

When the ID number stored in the first address of the memory cartridge 2 is different from all of the ID numbers among the plurality of ID numbers registered in the ID registration storage means 4m, it is regarded as an incorrect ID number, and the memory It is treated as something that cannot be read from cartridge 2, and the ID
The confirmation storage means 4g is negated.

Further, the ID registration/check process is performed when the memory cartridge 2 is removed from the cartridge connector 9 while the ID number of the memory cartridge 2 is being read and the insertion/removal storage means 4f is negated, and when the ID confirmation storage means 4g is determined, the power supply determination storage means 41 is negated to stop the power supply to the memory cartridge 2.

By checking the ID number of the inserted memory cartridge 2 in this way, it is possible to prevent malfunctions due to the insertion of a memory cartridge 2 unrelated to this printer/controller, and furthermore, it is possible to enable multiple ID numbers. A plurality of predetermined memory cartridges 2
You can also use

Next, regarding the cartridge read communication process, the process after the IDM recognition storage means 4g is confirmed will be explained. The reference numbers assigned to each member are the same as those in FIG. This process has already been outlined in the description of FIGS. 9 and 10, but will be explained in detail once again.

When the MCD control unit 4 confirms that the memory cartridge 2 attached to the cartridge connector 9 has the correct ID number, it asserts the service request signal output port 8 to request the main control unit 1 to send a command. .

However, on the contrary, if it is confirmed that the memory cartridge 2 installed in the cartridge connector 9 has an incorrect ID number, the service request signal output port 8 is not asserted.

The main control unit 1 detecting the assertion of the service request signal output port 8 sends a cartridge sense command to the MCD 3 to confirm that the memory cartridge 2 with the correct ID number has been inserted.

The M that received the cartridge sense command
The CD 3 returns the contents of the ID confirmation storage means 4g to the main control section 1.

When the main control unit 1 receives the contents of the ID confirmation storage means 4g, if it is confirmed that the memory cartridge 2 inserted into the MCD 3 has the correct ID number, the main control unit 1
Send cartridge read command to CD 3.

said M that received said cartridge read command;
The CD3 asserts the power supply determination storage means 41,
Power is supplied to the memory cartridge 2 for 100 seconds.
After m5ec, the read/write determination storage means 4j is asserted, and the data in the memory cartridge 2 is read out and transmitted to the main control section 1.

When the main control unit 1 finishes receiving data from the memory cartridge 2, it sends a cancel command to the MCD 3.

The MCD 3 that received the cancel command:
While reading data from the memory cartridge 2, the power supply excursion storage means 411 and read/write determination storage means 4j are sequentially negated, and the power supply to the memory cartridge 2 is stopped.

Further, when the memory cartridge 2 is removed while the memory cartridge 2 is being accessed, that is, when the insertion/extraction storage means 4f is negated, the power supply determination storage means 41
, the read/write determination storage means 4j are sequentially negated and power supply to the memory cartridge 2 is immediately stopped.

In this way, power is supplied to the memory cartridge 2 only when reading from or writing to the memory cartridge 2.

According to the above configuration, the power supply device of the present invention includes:
The controller includes means for detecting insertion and removal of a memory cartridge, and means for controlling power supply to the memory cartridge based on the detection, to detect completion of insertion and removal of the memory cartridge, and to read information data from the memory cartridge. Power can be supplied only when reading and writing.

In the first embodiment described above, a timer was provided to read and store three insertion/removal detection signals every 5 m5ec.

However, instead of the timer, for example, it is also possible to read several tens of insertion/removal detection signals and use the time required for this as the timer time. That is, while reading several tens of insertion/extraction detection signals, if the insertion/extraction detection signals are not maintained in the same state, the number of readings is increased so as not to determine that a memory cartridge has been inserted.

When removal is detected, three values are read and if two are in the same state, it is determined that the memory cartridge has been removed. Therefore, the time from detection to determination can be substantially longer at the time of insertion and shorter at the time of removal, and the same effect as that obtained by using the timer as in the first embodiment described above can be obtained.

Furthermore, in the first embodiment described above, the sampling time is 5
m5ec was used to capture the insertion/removal detection signal, but by changing the sampling time period at insertion and removal, making it longer at insertion and shorter at removal, the memory cartridge It is also possible to detect the insertion and removal of the

Further, the present invention is not limited to the embodiment of the insertion/removal detection device described above, and it goes without saying that various modifications and applications can be made without departing from the gist of the invention.

[Effects of the Invention] As detailed above, according to the present invention, when a memory cartridge is inserted into a connector, it is detected that the memory cartridge is securely inserted and the connection state is stable, and power is supplied to the memory cartridge. be exposed.

Therefore, data stored in the memory cartridge can be prevented from being destroyed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a printer controller according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a memory cartridge, FIG. 3 is a block diagram showing the configuration of an MCD control section, and FIG. FIG. 4 is a block diagram showing the configuration of the work RAM, FIGS. 5(a) to (d) are block diagrams showing the configuration of the storage storage means (CNCTFLAG), and FIG. 6 is a block diagram showing the configuration of the ID registration storage means (IDNUM). 7 is a block diagram showing an example of the configuration of the cartridge insertion/removal detection port, FIG. 8 is a block diagram showing an example of the configuration of the cartridge power supply port 12, and FIG. 9 is a flowchart showing the operation of reading the memory cartridge. , FIG. 10 is a timing chart corresponding to the read operation in FIG. 9,
FIG. 11 is a timing chart of the operation of insertion/removal detection processing;
Figure 12 is a time chart of the operation of power supply processing,
FIG. 3 is a flowchart showing the operation of ID registration/check processing. DESCRIPTION OF SYMBOLS 1...Printer controller main control unit, 2...Memory cartridge, 3...Memory cartridge driver, 4...MCD control unit, 5...Address/data bus, 6...Said communication control Port, 7... Said communication data boat, 8... Service request signal output port,
9...Cartridge connector, 10...Cartridge data/address port, 11...Cartridge insertion/removal detection board, 12...Cartridge power supply port. Applicant's representative Patent attorney Atsushi Tsuboi Figure (a) Figure 5 (b) Figure 5 <c> Figure (d) Figure 7 (Procedure Neyama correct writing method) Figure 7 (1990) August 17th

Claims (2)

[Claims] (1) a memory cartridge storing various control information; an insertion/removal detection means for detecting whether the memory cartridge is inserted into or removed from a connector; a control means for reading an insertion/removal detection signal from the insertion/removal detection means; and an insertion/removal detection means. means detects the insertion of the memory cartridge with a first filtering time of a predetermined length capable of removing instantaneous noise, and removes the memory cartridge with a second filtering time shorter than the first filtering time. A memory cartridge insertion/removal detection device characterized by detecting the insertion/removal of a memory cartridge. (2) Contact detection means that generates a contact detection signal according to the contact state between the memory cartridge and the connector, and sampling that samples the contact detection signal from the contact detection means at a predetermined period and sequentially stores it as binary information. means, an insertion/removal determining means for determining insertion/removal of the memory cartridge by referring to a plurality of pieces of the binary information, and the insertion/removal determining means is activated when the insertion/removal determination of the memory cartridge is made; a counting means that is reset when the determination is made; power is supplied to the memory cartridge when the counting means counts a predetermined number; and the insertion/removal determining means determines whether or not the memory cartridge is removed. 1. A memory cartridge insertion/removal detection device, comprising: power supply control means for stopping the supply of power when the insertion/removal of the memory cartridge is completed.