protech POS-3520, User Manual

Page: 28 / 109

Chapter 2 System Configuration
POS-3520 USER
’
S MANUAL
Page: 2-15
2-8. CASH DRAWER CONNECTOR
DRW1, DRW2: Cash Drawer Connector
The pin assignments are as follows:
PIN ASSIGNMENT
1 GND
2 Drawer Open
3 Drawer Sense
4 +12V
5 NC
6 GND
PROX-A3520 cash drawer control in GPIO port
To Open Drawer1 (GPIO 7)
Write "0"h to I/O space register "50C"h Bit 7
To Close Drawer1
Write "1"h to I/O space register "50C"h Bit 7
Detect Drawer1 Status
Read I/O space register "50E"h (GPIO 20)
Definition (bit4)
To Open Drawer2 (GPIO 6)
Write "0"h to I/O space register "50C"h Bit 6
To Close Drawer2
Write "1"h to I/O space register "50C"h Bit 6
Detect Drawer2 Status
Read I/O space register "538"h (GPIO 37)
Definition (bit5)
1
6
DRW1
1
6
DRW2