101-0898 Rabbit Semiconductor, 101-0898 Datasheet - Page 32

• Manufacturer Part Number: 101-0898
• Description: KIT WEB SECURE EMBEDDED RCM3700
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore 3000r

Specifications of 101-0898

• Main Purpose: Interface, Ethernet
• Utilized Ic / Part: RCM3700
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Other names: 101-898; 101-898

4.1.1 Memory I/O Interface
The Rabbit 3000 address lines (A0–A18) 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–PB5 and PB7 can also be used as an external
address bus.
When using the external I/O bus for either Ethernet or the LCD/keypad module on the
Prototyping Board, or for any other reason, you must add the following line at the begin-
ning of your program.
#define PORTA_AUX_IO
// required to enable external I/O bus
4.1.2 Other Inputs and Outputs
/RES is an output from the reset circuitry that can be used to reset other peripheral devices.
This pin can also be used to reset the microprocessor.
RabbitCore RCM3700 User’s Manual
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