User`s manual

PK2200D-92 s Interrupts and Adresses
Table D-5. PK2200 External I/O Device Registers (continued)
Address Bit(s) Symbol Function
0x100 0–3 RTALE
Real-time clock, address
register
0x120 0–3 RTRW Real-time clock, read/write
data register
0x140 7 BUZZER
Self-resonating buzzer. Set bit
7 to turn on. Clear bit 7 to turn
off.
0x160 7 ENB485 Set bit 7 to enable RS-485
channel
. Clear bit 7 to disable.
0x180 0–7 DIGBANK1
Digital Input, Bank 1. Bit 0
corresponds to input 1; bit 7
corresponds to input 8.
0x181 0–7 DIGBANK2 Digital Input, Bank 2. Bit 0
corresponds to input 9; bit 7
corresponds to input 16.
0x1A1 4–7 KROW1L Keypad drive row 1, rightmost
4 keys. Bit 4 is rightmost key.
Bit 5 is key next to that, etc.
Row 1 is the bottom-most row.
0x1A2 4–7 KROW2L Keypad drive row 2, rightmost
4 keys. Bit 4 is rightmost key.
Bit 5 is key next to that, etc.
0x1A4 4–7 KROW3L
If there were support for a 4×6
keypad, this would be drive
row 3. As of now, it reads
jumper JP4.
0x1A8 4–7 KROW4L
As of now, this address is
reserved.
0x1AF 4–7 KROWAL Keypad, all rows, rightmost 4
keys. Bit 4 is rightmost key.
Bit 5 is key next to that, etc.
Row 1 is the bottom-most row.
0x1B0 6-7 SDA_R
NMI
Bit 7 represents the EEPROM
SDA line. Bit 6 presents the
power-failure (NMI) state.
continued…