Use Of Rabbit 3000 Parallel Ports - Rabbit RCM3365 User Manual

B.6 Use of Rabbit 3000 Parallel Ports
Table B-5 lists the Rabbit 3000 parallel ports and their use for the Prototyping Board.
Table B-5. Prototyping Board Use of Rabbit 3000 Parallel Ports
Port I/O
PA0–PA3 Data Bus
PA4 Data Bus
PA5–PA7 Data Bus
PB0 Input
PB1 Input
PB2–PB5 Address Bus
PB6–PB7 Address Bus
PC0 Output
PC1 Input
PC2 Output
PC3 Input
*
Output
PC4
*
Input
PC5
PC6 Output
PC7 Input
PD0 Output
PD1 Output
PD2 Output
PD3 Output
PD4–PD6 Input
PD7 Output
PE0–PE1 Input
PE2 Output
PE3 Output
PE4–PE5 Input
PE6 Output
100
Use
LCD/keypad module, motor driver, LEDs
LCD/keypad module, motor driver,
relay and relay LED
LCD/keypad module, motor control
CLKB, xD-Picture Card Detect
CLKA Programming Port
LCD/keypad module
—
TXD SPI, serial flash
RXD SPI, serial flash
TXC RS-485
RXC RS-485
TXB
RXB
TXA Programming Port
RXA Programming Port
RCM3365/RCM3375
USR
(shared with NAND flash busy)
Soldered-in NAND flash chip enable
SPI, serial flash
SPI, serial flash
Serial flash
RS-485 Tx enable
IN0–IN1
Ethernet AEN,
NAND flash function enable
Motor driver A clock pulse
IN2–IN3, J8
LCD/keypad module
Initial State
Active high
Active high
Active high
(when not driven by CLKA)
High (SPI disabled)
Serial Port D
High (SPI disabled)
High (RS-485 disabled)
Serial Port C
High (RS-485 disabled)
High (disabled)
Serial Port B
High (disabled)
Serial Port A
LED off
High (disabled)
Low (SPI disabled)
High (SPI CS disabled)
High (disabled)
Low (RS-485 Tx disabled)
High (disabled)
Low (disabled)
High (disabled)
RabbitCore RCM3365/RCM3375
High
High
High
High
High
High
High
High
High