22
RabbitCore RCM2200
4.1.4 Other Inputs and Outputs
As shown in Table 1, pins PA0–PA7 can be used to allow the Rabbit 2000 to be a slave to
another processor. The slave port also uses PB2–PB5, PB7, and PE7.
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 Ethernet interface chip.
Header J
5
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 1. RCM2200 Pinout Configurations (continued)
Pin
Pin Name
Default Use
Alternate Use
Notes
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