Digi RCM4000 - Manual (Page 31)

User’s Manual 25
Figure 7 shows the use of the Rabbit 3000 microprocessor ports in the RCM4000 modules.
Figure 7. Use of Rabbit 4000 Ports
The ports on the Rabbit 4000 microprocessor used in the RCM4000 are configurable, and
so the factory defaults can be reconfigured. Table 2 lists the Rabbit 4000 factory defaults
and the alternate configurations.
R
ABBIT®
4000
Port A Port B Port D
Port E
PA0–PA7 PB2–PB7
PE0–PE7
PD0–PD7
/RESET_OUT,
/IOWR,
STATUS
SMODE0
SMODE1
Watchdog
11 Timers
Clock Doubler
Slave Port
Real-Time Clock
RAM
Backup Battery
Support
Flash
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
Serial Ports E & F
PC4 and PC5 are
not available on
RCM4100 module.
*