User`s manual

User’s Manual 21
Figure 6 shows the use of the Rabbit 3000 microprocessor ports in the RCM3400 modules.
Figure 6. Use of Rabbit 3000 Ports
The ports on the Rabbit 3000 microprocessor used in the RCM3400 are configurable, and
so the factory defaults can be reconfigured. Table 2 lists the Rabbit 3000 factory defaults
and the alternate configurations.
RABBIT
®
3000
Port A
Port B
Port D
Port E
PA0PA7
PB1PB7
PE0PE2
PE4PE7
PD0
PD4PD7
/RESET,
/IOWR,
STATUS
SMODE0
SMODE1
Watchdog
11 Timers
Clock Doubler
Slave Port
Real-Time Clock
RAM
Backup Battery
Support
Flash
Port F
PF0PF1
PF4PF7
PG0PG7
Port G
(+Serial Ports)
Misc. I/O
/RES
_
IN
/IORD
PC4*
PC5*
Port C
(Serial Ports C & D)
Programming
Port
(Serial Port A)
A/D Converter
(Serial Port B)
PB1, PC6
PC7, /RES
PC0, PC2
PC1, PC3
Port G
(Serial Ports E & F)
PG2, PG6
PG3, PG7
PC4 and PC5 are
not available on
RCM3400 I/O pins.
*