User`s manual

14 RabbitCore RCM2200
3.1.4 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 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 1. RCM2200 Pinout Configurations (continued)
Pin Pin Name Default Use Alternate Use Notes