Rabbit RabbitCore RCM4200 User Manual page 114

All signals from the RCM4200 module are available on header J2 of the Prototyping
Board. The remaining ports on the Rabbit 4000 microprocessor are used for RS-232 serial
communication. Table B-2 lists the signals on header J2 and explains how they are used
on the Prototyping Board.
Table B-2. Use of RCM4200 Signals on the Prototyping Board
Pin
1
2
3
4
5
6
8–15
16
17
18
19
20
21
22–23
24–25
26–27
28–29
30–31
32–33
34
35–38
39
40–47
48
49
50
* PD0–PD7 (output, high) are available on these pins for the RCM4210.
There is a 1.3" × 2" through-hole prototyping space available on the Prototyping Board.
The holes in the prototyping area are spaced at 0.1" (2.5 mm). +3.3 V, +5 V, and GND traces
run along the top edge of the prototyping area for easy access. Small to medium circuits
can be prototyped using point-to-point wiring with 20 to 30 AWG wire between the proto-
typing area, the +3.3 V, +5 V, and GND traces, and the surrounding area where surface-
108
Pin Name
+3.3 V +3.3 V power supply
GND
/RST_OUT Reset output from reset generator
/IORD External read strobe
/IOWR External write strobe
/RESET_IN Input to reset generator
PA0–PA7 Output, pulled high
PB0 CLKB (used by A/D converter RCM4200 only)
PB1 Programming port CLKA
PB2 LED DS2 (normally high/off)
PB3 LED DS3 (normally high/off)
PB4 Switch S2 (normally open/pulled up)
PB5 Switch S3 (normally open/pulled up)
PB6–PB7 Output, pulled high
PC0–PC1 Serial Port D (RS-232, header J4) (high)
PC2–PC3 Serial Port C (used by serial flash) (high)
PC4–PC5 Serial Port B (used by A/D converter RCM4200 only)
PC6–PC7 Serial Port A (programming port) (high)
PE0–PE1 Output (high)
PE2 External I/O strobe, Ethernet
PE3–PE6 Output (high)
PE7 Serial flash SCLK
LN0–LN7
A/D converter inputs (RCM4200 only)
A/D converter CONVERT input (RCM4200
CONVERT
only)<Superscript>*
A/D converter reference voltage (RCM4200
VREF
only)<Superscript>*
A/D converter ground (RCM4200
AGND
only)<Superscript>*
Prototyping Board Use
*
RabbitCore RCM4200