Jameco Electronics 3000 User Manual

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Rabbit 3000 Microprocessor
B.2  Pins with Alternate Functions
The Rabbit 3000A provides greater flexibility for multiplexing I/O functions to other pins. 
The following alternate connections were introduced in the Rabbit 3000A for these 
peripherals, and are indicated by an asterisk in Table 5-2.
Slave port CS
/ASCS: Alternate slave port chip select input
Serial Ports E/F
ARXE: Alternate Serial Port E receive
ARCLKE: Alternate Serial Port E receive clock (HDLC)
ARXF: Alternate Serial Port F receive
ARCLKF: Alternate Serial Port F receive clock (HDLC)
PWM outputs
APWM3: Alternate PWM output, bit 3
APWM2: Alternate PWM output, bit 2
APWM1: Alternate PWM output, bit 1
APWM0: Alternate PWM output, bit 0