One World Touch OP 1200, Service Manual

Page: 125 / 135

Service Manual version 1008
OP 1200/1500/1700 (PC920 Intel 945G)
8-117
B: DIO (Digital Input & Output)
The OP SERIES provides 2-channel digital input and output that can be used for the system’s simple
automation control needs. The digital I/O can be configured to control the opening of a cash drawer
or to sense the warning signal of an uninterrupted power system (UPS) or to do the store security
control.
The DIO port address and pin definition is listed below:
I/O Port address: 200H/208H by CMOS setting
Read: SD0, SD1
Write: SD4, SD5
The Digital I/O is of TTL interface. It is controlled via software programming.
Digital I/O Programming
Input/output address: 208H
In_Data 0~3=SD0~SD1
Out_Data 0~3 SD4~SD7
EXAMPLE:
10 REM Digital I/O example program
20 X = INP (&H208)
REM INPUT Digital I/O port
for 4 bit
30 X = OUT (&H208) REM OUTPUT Digital I/O port
for 4 bit
60 END
100 Return
Port 208H Definition
SD0 IN_0
SD1 IN_1
-IOR206H
74LS244
2 18
4 16
6 14
8 12
11 9
13 7
15 5
17 3
1
19
20
10
1A1 1Y1
1A2 1Y2
1A3 1Y3
1A4 1Y4
2A1 2Y1
2A2 2Y2
2A3 2Y3
2A4 2Y4
1G
2G
VDD
GND
IO 206H(READ)
IO 208H(READ)
SD 4 OUT_0
SD 5 OUT_1
-IOW206H
74LS273
3
4
7
8
13
14
17
18
11
1
2
5
6
9
12
15
16
19
20
10
D1
D2
D3
D4
D5
D6
D7
D8
CLK
CLR
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
VCC
GND
IO 206H(WRITE)
IO 208H(WRITE)