20-101-0522 Rabbit Semiconductor, 20-101-0522 Datasheet - Page 15

• Manufacturer Part Number: 20-101-0522
• Description: MODULE RABBITCORE RCM3220
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0522

• Module/board Type: MPU Core Module
• Product: Microcontroller Modules
• Core Processor: Rabbit 3000
• Clock Speed: 44.2 MHz
• Interface Type: Ethernet, Serial
• Flash: 512 KB
• Timers: 10 x 8 bit, 1 x 10 bit
• Operating Supply Voltage: 3.15 V to 3.45 V
• Board Size: 69 mm x 47 mm x 22 mm
• Core: RCM3220
• Processor Series: RCM3200
• For Use With/related Products: RCM3220
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1098

2.1.1 Memory I/O Interface
The Rabbit 3000 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.
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, you must add the following line at the beginning of
your program.
#define PORTA_AUX_IO
// required to enable auxiliary I/O bus
The STATUS output has three different programmable functions:
3. It can be driven low on the first op code fetch cycle.
4. It can be driven low during an interrupt acknowledge cycle.
5. It can also serve as a general-purpose output.
2.1.2 Other Inputs and Outputs
Two status mode pins, SMODE0 and SMODE1, are available as inputs. The logic state of
these two pins determines the startup procedure after a reset.
/RESET_IN is an external input used to reset the Rabbit 3000 microprocessor and the
RCM3200 memory. /RES is an output from the reset circuitry that can be used to reset
other peripheral devices.
User’s Manual
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