668-0011 Rabbit Semiconductor, 668-0011 Datasheet - Page 204

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668-0011

Manufacturer Part Number
668-0011
Description
IC MPU RABIT3000A 55.5MHZ128LQFP
Manufacturer
Rabbit Semiconductor
Datasheet

Specifications of 668-0011

Rohs Status
RoHS non-compliant
Processor Type
Rabbit 3000 8-Bit
Speed
55.5MHz
Voltage
2.5V, 2.7V, 3V, 3.3V
Mounting Type
Surface Mount
Package / Case
128-LQFP
Features
-
Other names
316-1043

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
668-0011
Manufacturer:
Rabbit Semiconductor
Quantity:
10 000
23.2 Dependencies
23.2.1 I/O Pins
The external I/O bus uses PA0–PA7 for data, and PB2–PB7 for address lines, depending
on the setting in SPCR.
The /IOWR, /IORD, and /BUFEN pins are dedicated strobes for external I/O accesses.
The I/O strobes can be directed out to pins on Parallel Port E; each bank can be directed to
the appropriate pin (bank zero on PE0; bank one on PE1; etc.). The strobes will affect out-
puts on /IOWR, /IORD, and /BUFEN at all times.
23.2.2 Clocks
All external I/O accesses and strobes are based on the processor clock.
23.2.3 Other Registers
23.2.4 Interrupts
There are no interrupts associated with external I/O.
194
SPCR
PCFR, PCALR, PCAHR
PDFR, PDALR, PDAHR,
PEFR, PEALR, PEAHR
Register
Enable the external I/O bus.
Select Parallel Port C, D, or E pins as I/O strobe
outputs.
Select PD1, PD3, PD5, or PD7 as address bits 6-7.
Rabbit 3000 Microprocessor User’s Manual
Function

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