Freescale Semiconductor, Inc.
Parallel Input/Output
Port C
4.5 Port C
Port C is an 8-bit bidirectional port, with both data and data direction
registers. In addition to their I/O capability, port C pins are used as the
nonmultiplexed data bus pins, as shown in the following table.
Alternate
Pin
function
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
D0
D1
D2
D3
D4
D5
D6
D7
In expanded or test
mode, the pins
become the data bus
and port C is not
included in the
memory map.
The state of the pins on reset is mode dependent. In single chip or
bootstrap mode, port C pins are high-impedance inputs. In expanded or
test modes, port C pins are the data bus I/O and PORTC/DDRC are not
in the memory map.
4.5.1 PORTC — Port C data register
State
on reset
Address bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
Port C data (PORTC)
$0006 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 undefined
The bits may be read and written at any time and are not affected by
reset.
MC68HC11P2 — Rev 1.0
Technical Data
Parallel Input/Output
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