668-0011 Rabbit Semiconductor, 668-0011 Datasheet - Page 83

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

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

10.1 Overview
Parallel Port C is a byte-wide port that has four inputs and four outputs. The even-numbered
ports—PC0, PC2, PC4, and PC6—are outputs. The odd-numbered ports—PC1, PC3,
PC5, and PC7—are inputs.. These are simple inputs and outputs controlled and reported in
the Port C Data Register (PCDR).
The Parallel Port C pins may be used as serial port pins, and the inputs can be used as
inputs to the Input Capture peripheral.
After reset, the default condition for Parallel Port C is four outputs (the even-numbered
bits) and four inputs (the odd-numbered bits). For compatibility with the Rabbit 2000
microprocessor, these outputs are driven with a logic zero (low) on PC6 and a logic one
(high) on PC4, PC2, and PC0. When PCDR is read, the logic level on the pin is returned.
If the pin is an output, the value it is set to is returned.
Chapter 10 Parallel Port C
Pin Name
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Table 10-1. Parallel Port C Alternate Pin Functions
Serial Ports A–D
Outputs
TXA
TXB
TXC
TXD
—
—
—
—
10. P
Serial Ports A–D
RXA
RXB
RXC
RXD
—
—
—
—
ARALLEL
Inputs
Input Capture
—
—
—
—
×
×
×
×
P
ORT
C
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