Rabbit RabbitCore RCM4400W Product Manual - page 110
102
RabbitCore RCM4400W
All signals from the RCM4400W 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 as configured by the
brdInit()
function call where applicable, and explains how they are used on the Prototyping Board.
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-
mount components may be installed. Small holes are provided around the surface-mounted
components that may be installed around the prototyping area.
Table B-2. Use of RCM4400W Signals on the Prototyping Board
Pin
Pin Name
Prototyping Board Use
1
+3.3 V
+3.3 V power supply
2
GND
3
/RST_OUT Reset output from reset generator
4
/IORD
External read strobe
5
/IOWR
External write strobe
6
/RESET_IN Input to reset generator
8–15
PA0–PA7
Output, low
16
PB0
Serial flash SCLK
17
PB1
Output, high (programming port CLKA)
18
PB2
LED DS2 (output normally high/off)
19
PB3
LED DS3 (output normally high/off)
20
PB4
Switch S2 (input normally open/pulled up)
21
PB5
Switch S3 (input normally open/pulled up)
22–23
PB6–PB7
Output, high
24–25
PC0–PC1
Serial Port D (RS-232, header J4) (high)
26–27
PC2–PC3
Serial Port C (RS-232, header J4) (high)
28–29
PC4–PC5
Serial Port B (used by serial flash on RCM4400W)
30–31
PC6–PC7
Serial Port A (programming port) (high)
32–36
PE0–PE4
Output, high
37–38
PE5–PE6
Not available
39
PE7
Output, pulled high
48–49
N/A
Not available
50
GND