User`s manual

PK2200 Interrupts and Addresses s D-93
continued . . .
Table D-5. PK2200 External I/O Device Registers (continued)
Address Bit(s) Symbol Function
0x1B1 4–7 KROW1H
Keypad drive row 1, leftmost 2
keys. Bit 5 is leftmost key. Bit 4 is
key next to that. Bit 7 represents
EEPROM SDA line. Bit 6 presents
power-failure (NMI) state. Row 1
is bottom-most row.
0x1B 2 4–7 KROW2H
Keypad drive row 2, leftmost 2
keys. Bit 5 is leftmost key. Bit 4 is
next. Bit 7 represents EEPROM
SDA line. Bit 6 presents power-
failure (NMI) state.
0x1B4 4–7 KROW3H If there were support for a 4×6
keypad, this would be drive row 3.
As of now, bits 4 and 5 are
reserved. Bit 7 is EEPROM SDA
line. Bit 6 presents power-failure
(NMI) state.
0x1B8 4–7 KROW4H
If there were support for a 4×6
keypad, this would be drive row 4.
As of now, bits 4 and 5 are
reserved. Bit 7 represents
EEPROM SDA line. Bit 6 is
power-failure (NMI) state.
0x1BF 4–7 KROWAH Keypad, all rows, leftmost 2 keys.
Bit 5 is the leftmost key. Bit 4 is
the key next to that. Bit 7
represents the EEPROM SDA line.
Bit 6 presents the power-failure
(NMI) state. Row 1 is the bottom-
most row.
0x1C0 5 DRV1 Digital output 1. Writing 0x20
turns on output. Writing 0 turns off
output.
0x1C1 5 DRV2 Digital output 2. Writing 0x20
turns on output. Writing 0 turns off
output.
0x1C2 5 DRV3
Digital output 3. Writing 0x20
turns on output. Writing 0 turns off
output.
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