User`s manual

User’s Manual Hardware Reference 2–3
Table 1: RabbitCore RCM2100 Series Pinout Configurations
Pin Pin Name Default Use Alternate Use Notes
Header J1
1VCC
2GND
3 PCLK Output (Internal Clock) Output
Disable by removing R20;
can also be disabled in
software (Dynamic C
7.03 and later versions)
4–11 PA[7:0] Parallel I/O
Slave port data bus
SD0–SD7
12–24 BA[12:0] Output
Buffered Rabbit 2000
address bus
25 PC0 Output TXD
26 PC1 Input RXD
27 PC2 Output TXC
28 PC3 Input RXC
29 PC4 Output TXB
30 PC5 Input RXB
31 PC6 Output TXA
Connected to
programming port
32 PC7 Input RXA
33–36 PD[0:3]
Bitwise or parallel pro-
grammable I/O, can be
driven or open-drain
output
16 mA sourcing and
sinking current at full AC
switching speed
37 PD4 ATXB output Ethernet chip RSTDRV
38 PD5 ARXB input Ethernet chip BD5
39 PD6 ATXA output Ethernet chip BD6
40 PD7 ARXA input Ethernet chip BD7