Other Inputs And Outputs - Rabbit RabbitCore RCM2200 User Manual

Table 1. RCM2200 Pinout Configurations (continued)
Pin Pin Name
1–8 PA[0:7]
9 /RESET
10 PB0
11 PB2
12 PB3
13 PB4
14 PB5
15 PB7
16–23 D[7:0]
24 VBAT
25 VCC
26 GND

2.1.4 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.
8
Default Use
Bytewide
Slave port data bus
programmable
SD0–SD7
parallel I/O
Reset output Reset input
Serial port clock CLKB
Input
input or output
Input Slave port write /SWR
Input Slave port read /SRD
Input SA0
Input SA1
Slave port attention line
Output
/SLAVEATTN
Input/Output
3 V battery input
Alternate Use
This weak output can be
driven externally
Slave port address lines
Rabbit 2000 data bus
RabbitCore RCM2200
Notes