Use Of Rabbit 3000 Parallel Ports - Z-World Fox LP3500 User Manual

A.4 Use of Rabbit 3000 Parallel Ports
Figure A-6 shows the Rabbit 3000 parallel ports.
PC0, PC2, PC4
(Serial Ports B,C & D)
PC1, PC3, PC5
PG2, PG6
PG3, PG7
PC6
PB1, PC7, /RES
Table A-3 lists the Rabbit 3000 parallel ports and their use in the LP3500.
Port
PA0 Input
PA1 Input
PA2 Input
PA3 Input
PA4 Input
PA5 Input
PA6 Input
PA7 Input
PB0 Input
PB1 Input
PB2 Input
User's Manual
PB0–PB5
PA0–PA7
Port A Port B
Port C
Port G
Real-Time Clock
(Serial Ports E & F)
Watchdog
11 Timers
Programming
Port
Slave Port
(Serial Port A)
Clock Doubler
Backup Battery
RAM
Support
Figure A-6. LP3500 Rabbit-Based Subsystems
Table A-3. Use of Rabbit 3000 Parallel Ports
I/O
IN08
IN09
IN10
IN11
IN12
IN12
IN14
IN15
Power Input Detect
CLKA
IN04
PD0–PD7
PB6–PB7
Port D
Port E
Port F
Port G
(+Serial Ports)
Misc. I/O
Flash
Signal
PE0–PE1, PE4–PE5
PE2–PE3, PE6–PE7
PF1–PF2
PF0, PF3–PF7
PG3, PG7
PG0–PG2, PG4–PG6
/RES _ IN
/IORD
/RESET,
/IOWR,
STATUS
SMODE0
SMODE1
Output Function State
Pulled up
Pulled up
Pulled up
Pulled up
Pulled up
Pulled up
Pulled up
Pulled up
Low when external power
source is connected; high
for battery
Pulled up when not driven
by programming port
Pulled up
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