Use Of Rabbit 3000 Parallel Ports - Rabbit RCM3000 User Manual

B.5 Use of Rabbit 3000 Parallel Ports
Table B-2 lists the Rabbit 3000 parallel ports and their use for the RCM30/31/32XX
Prototyping Board.
Port
PA0–PA7
PB0–PB1
PB2–PB5
PB6–PB7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PD0
PD1
PD2–PD4
PD5
PD6–PD7
PE0–PE1
PE2
PE3
PE4
PE5
PE6
PE7
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Table B-2. RCM30/31/32XX Prototyping Board

Use of Rabbit 3000 Parallel Ports

I/O
Output
Configurable external I/O bus
Input Not used
Input
Configurable external I/O bus
Output Not used
Output Not used
Input Not used
Output TXC
Input RXC
Output TXB
Input RXB
Output TXA Programming Port
Input RXA Programming Port
Output Ethernet RSTDRV
Input Not used
Output Not used
Input Not used
Output Not used
Output Not used
Output Ethernet AEN
Output LCD device select
Output IrDA speed select
Output Not used
Output External I/O strobe
Output Not used
Use
High when not driven
Pulled up on RCM3000
High when not driven
Pulled up on RCM3000
Pulled up on RCM3000
Serial Port C
Pulled up on RCM3000
Serial Port B
Pulled up on RCM3000
Serial Port A
Pulled up on RCM3000
Pulled up on RCM3000
Initial State
by I/O bus
by I/O bus
High (disabled)
High (disabled)
High (disabled)
High (disabled)
High
High
Pulled up on
Prototyping Board
High
High
High
Low (disabled)
Low (disabled)
High
High (disabled)
High (disabled)
RabbitCore RCM3000