MC68HC08AS32 Datasheet, PDF (191/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

15.5 Port C
Input/Output (I/O) Ports
Port C
Port C is a 5-bit general-purpose bidirectional I/O port that shares one of
its pins with the bus clock (MCLK).
15.5.1 Port C Data Register
The port C data register contains a data latch for each of the five port C
pins.
Address: $0002
Bit 7
6
5
4
3
2
1
Read: 0
0
0
PTC4 PTC3 PTC2 PTC1
Write: R
R
R
Reset:
Unaffected by Reset
R = Reserved
Alternate
Functions:
MCLK
Figure 15-7. Port C Data Register (PTC)
Bit 0
PTC0
PTC[4:0] — Port C Data Bits
These read/write bits are software-programmable. Data direction of
each port C pin is under the control of the corresponding bit in data
direction register C. Reset has no effect on port C data.
MCLK — T12 System Bus Clock Bit
The bus clock (MCLK) is driven out of PTC2 when enabled by the
MCLKEN bit in PTCDDR7.
MC68HC08AS32 — Rev. 3.0
MOTOROLA
Input/Output (I/O) Ports
Advance Information
191