Figure 7 shows the use of the Rabbit 3000 microprocessor ports in the RCM4000 modules.

PA0–PA7PB2–PB7PD0–PD7

PC0, PC2 PC1, PC3

PB1, PC6 PC7, /RES

PC4* PC5*

Port A

Port C

(Serial Ports C & D)

Serial Ports E & F

Programming

Port

(Serial Port A)

A/D Converter (Serial Port B)

Port B

RABBIT®

4000

Real-Time Clock

Watchdog

11Timers Slave Port

Clock Doubler

Port D

Port E

PE0–PE7

 

/RES_IN

 

/IORD

Misc. I/O

/RESET_OUT,

 

 

/IOWR,

 

STATUS

 

SMODE0

 

SMODE1

*PC4 and PC5 are not available on RCM4100 module.

RAM

Backup Battery

Flash

Support

 

 

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.

User’s Manual

25

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Image 31
Digi RCM4000 user manual