70 RabbitCore RCM3000B.5 Use of Rabbit 3000 Parallel PortsTable B-2 lists the Rabbit 3000 parallel ports and their use for the RCM30/31/32XXPrototyping Board.Table B-2. RCM30/31/32XX Prototyping BoardUse of Rabbit 3000 Parallel PortsPort I/O Use Initial StatePA0–PA7 Output Configurable external I/O bus High when not drivenby I/O busPB0–PB1 Input Not used Pulled up on RCM3000PB2–PB5 Input Configurable external I/O bus High when not drivenby I/O busPB6–PB7 Output Not used Pulled up on RCM3000PC0 Output Not used High (disabled)PC1 Input Not used Pulled up on RCM3000PC2 Output TXC Serial Port C High (disabled)PC3 Input RXC Pulled up on RCM3000PC4 Output TXB Serial Port B High (disabled)PC5 Input RXB Pulled up on RCM3000PC6 Output TXA Programming Port Serial Port A High (disabled)PC7 Input RXA Programming Port Pulled up on RCM3000PD0 Output Ethernet RSTDRV HighPD1 Input Not used Pulled up on RCM3000PD2–PD4 Output Not used HighPD5 Input Not used Pulled up onPrototyping BoardPD6–PD7 Output Not used HighPE0–PE1 Output Not used HighPE2 Output Ethernet AEN HighPE3 Output LCD device select Low (disabled)PE4 Output IrDA speed select Low (disabled)PE5 Output Not used HighPE6 Output External I/O strobe High (disabled)PE7 Output Not used High (disabled)Downloaded from Elcodis.com electronic components distributor
