101-1156 Rabbit Semiconductor, 101-1156 Datasheet - Page 40

• Manufacturer Part Number: 101-1156
• Description: KIT DEVELOPMENT INT'L RCM4200
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore 4000r
• Type: MPU Moduler

Specifications of 101-1156

• Contents: RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
• Processor To Be Evaluated: Rabbit 4000
• Data Bus Width: 8 bit
• Interface Type: Ethernet
• Silicon Manufacturer: Rabbit Semiconductor
• Core Architecture: Rabbit 4000
• Kit Contents: RCM4200 Module, Prototyping Board, AC Adapter, Cable, Dynamic C CD-ROM, Getting Started Instructions
• For Use With/related Products: RCM4200
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.1.1 Memory I/O Interface
The Rabbit 4000 address lines (A0–A19) and all the data lines (D0–D7) are routed inter-
nally to the onboard flash memory and SRAM chips. I/0 write (/IOWR) and I/0 read
(/IORD) are available for interfacing to external devices, and are also used by the
RCM4200.
Parallel Port A can also be used as an external I/O data bus to isolate external I/O from the
main data bus. Parallel Port B pins PB2–PB7 can also be used as an auxiliary address bus.
When using the auxiliary I/O bus for any reason, you must add the following line at the
beginning of your program.
Selected pins on Parallel Ports D and E as specified in Table 2 may be used for input
capture, quadrature decoder, DMA, and pulse-width modulator purposes.
4.1.2 Other Inputs and Outputs
The PE5–PE7 pins can be brought out to header J2 instead of the STATUS and the two
SMODE pins, SMODE0 and SMODE1, as explained in Appendix A.6.
/RESET_IN is normally associated with the programming port, but may be used as an
external input to reset the Rabbit 4000 microprocessor and the RCM4200 memory.
/RESET_OUT is an output from the reset circuitry that can be used to reset other
peripheral devices.
34
46
47
48
49
50
Pin
#define PORTA_AUX_IO
PD6
PD7
CONVERT
VREF
GND
Pin Name
Table 2. RCM4200 Pinout Configurations (continued)
Input/Output
Input/Output
Digital Input
Analog reference
voltage
Ground
Default Use
// required to enable auxiliary I/O bus
I/O Strobe I6
D14
PWM2
TXA/TXE
IA7
I/O Strobe I7
D15
PWM3
RXA/RXE
Input Capture
Alternate Use
Serial Port E
(RCM4210 only)
A/D converter
(RCM4200 only)
1.15 V/2.048 V/2.500 V
on-chip ref. voltage
(RCM4200 only)
Analog ground
RabbitCore RCM4200
Notes