Freescale Semiconductor, Inc.
Parallel Input/Output (I/O)
Port C
7.5 Port C
Port C is an 8-bit, general-purpose, bidirectional I/O port. PC7 has a high
current sink and source capability.
7.5.1 Port C Data Register
The port C data register (PORTC) shown in Figure 7-7 contains a data
latch for each of the eight port C pins. When a port C pin is programmed
to be an output, the state of its data register bit determines the state of
the output pin. When a port C pin is programmed to be an input, reading
the port C data register returns the logic state of the pin.
Address: $0002
Bit 7
6
5
4
3
2
1
Bit 0
PC0
Read:
Write:
Reset:
PC7
PC6
PC5
PC4
PC3
PC2
PC1
Unaffected by reset
Figure 7-7. Port C Data Register (PORTC)
PC7–PC0 — Port C Data Bits
These read/write bits are software programmable. Data direction of
each bit is under the control of the corresponding bit in data direction
register C. PC7 has a high current sink and source capability. Reset
has no effect on port C data.
MC68HC705C8A — Rev. 3
MOTOROLA
Technical Data
Parallel Input/Output (I/O)
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