User`s manual

2–4 Hardware Reference RabbitCore RCM2200
PE0, PE1, PE4, and PE5 can be used for up to two
external interrupts. PB0 can be used to access the
clock on Serial Port B of the Rabbit microprocessor.
PD4 can be programmed to
be a serial output for
Serial Port B. PD5 can
be used as a serial input by
Serial Port B.
PC4, PC5, PD0, PD1, PE2, PE3, and PE6 are used
for internal communication with the RealTek Ether-
net interface chip.
Header J5
1–8 PA[0:7]
Bytewide
programmable
parallel I/O
Slave port data bus
SD0–SD7
9
/RESET Reset output Reset input
This weak output can be
driven externally
10
PB0 Input
Serial port clock CLKB
input or output
11 PB2 Input Slave port write /SWR
12 PB3 Input Slave port read /SRD
13 PB4 Input SA0
Slave port address lines
14 PB5 Input SA1
15
PB7 Output
Slave port attention line
/SLAVEATTN
16–23 D[7:0] Input/Output Rabbit 2000 data bus
24 VBAT 3 V battery input
25 VCC
26 GND
Table 2–1: RabbitCore RCM2200 Pinout Configurations (continued)
Pin Pin Name Default Use Alternate Use Notes