MC68HC11P2 Datasheet, PDF (77/268 Pages) Motorola, Inc – Microcontrollers

4.5 Port C
Freescale Semiconductor, Inc.
Parallel Input/Output
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.
Pin
Alternate
function
PC0
D0

PC1
PC2
D1
D2



In expanded or test
 mode, the pins
PC3
D3


become the data bus
PC4
PC5
PC6
D4
D5
D6
 _{and port C is not}


included in the


memory map.
PC7
D7


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
Port C data (PORTC)
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$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
Parallel Input/Output
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Technical Data