Cash-Drawer Interface Circuit - Panasonic JS-170FR Series Service Manual

2.1.15

Cash-Drawer interface circuit

As an integrated POS, two Cash-Drawer interface circuits are provided.
To drive the cash drawer, 328H of the I/O port is used for interface control.
Drawer 1 is controlled with Bit 4 of Address 328, while Drawer 2 is controlled with Bit 5.
When "1" is written in Bit 4, a high level output is generated at the DRW1-OPN signal (Pin 118) of the GATEARRAY
(µPD65884GM). Then, Transistor Q25 is turned ON via Q24 and approx. +15V is supplied as the +DS1 signal.
When "1" is written in Bit 5, a high level output is similarly generated at the DRW2-OPN signal (Pin 117) of the GATEARRAY.
Then, Transistor Q26 is turned ON and approx. +15V is supplied as the +DS2 signal.
The drawer opening time can be selected by the use of Switches 3 and 4 of the DIPSW2.
The default setting is about 140msec.
Inside the GATEARRAY circuit, there is a circuit intended to avoid the simultaneous operation of Drawer 1 and Drawer 2.
CDSTATUS1 and CDSTATUS2 are the drawer status signals. For the type of a drawer to be connected, the logic may be
reversed.
In the present circuit, a low level is defined as the status when a drawer is closed. When using a drawer for which the logic has
been reversed, the section is short-circuited between Pin 5 and Pin 6 of the connector. (Arranged with a cable)
By making DRWCNT1 (Pin 119) and DRWCNT2 (Pin 114) of the GATEARRAY circuit turned to the high level, arrangements for
exclusive OR (EXOR) are made for the signals of DRWST1 (Pin 115) and DRWST2 (Pin 116) and also for the GATEARRAY
interior.
As a result, the software can conclude the judgment of Open or Close.
By reading out Address 32D of the I/O port, the logic can be defined at Bit 3 and 2.
GATEARY
D RW 1 - O P N
I N 3 2 0 - D 3
D RW C N T 1
D RW 2 - O P N
I N 3 2 0 - D 2
D RW C N T 2
DRV
118
115
+5V
10K
118
1K
DRAWER2
J S - 9 x x W S
117
116
+5V
10K
114
1K
3.3 (2W)
4.7K
(1/2W) 330u
22u
15K
Q202
DTC123Y
820 (1/2W)
+5V
1K
470
1u
22u
15K
Q203
DTC123Y
820 (1/2W)
+5V
1K
470
1u
2-45
Q204
2SB1140
1
FL +DS1
ERA15
2
GND
3
L CDSTATUS1
4
GND
5
6
Q205
2SB1140
1
FL +DS2
ERA15
2
GND
3
L CDSTATUS2
4
GND
5
6