MC68HC705P9CDW FREESCALE [Freescale Semiconductor, Inc], MC68HC705P9CDW Datasheet - Page 92

• Manufacturer Part Number: MC68HC705P9CDW
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Parallel Input/Output (I/O) Ports
7.6.2 Data Direction Register D (DDRD)
Technical Data
92
NOTE:
Data direction register D determines whether each port D pin is an input
or an output.
DDRD5 — Data Direction Register D Bit
Avoid glitches on port D pins by writing to the port D data register before
changing data direction register D bits from 0 to 1.
Figure 7-13
Reset:
$0007
Read:
Write:
This read/write bit controls the data direction of pin PD5. Reset clears
DDRD5, configuring PD5 as an input.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = PD5 configured as output
0 = PD5 configured as input
READ DATA DIRECTION REGISTER D ($0007)
WRITE DATA DIRECTION REGISTER D ($0007)
WRITE PORT D DATA REGISTER ($0003)
READ PORT D DATA REGISTER ($0003)
Bit 7
0
0
Figure 7-12. Data Direction Register D (DDRD)
Parallel Input/Output (I/O) Ports
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shows the I/O logic of port D.
= Unimplemented
6
0
0
Figure 7-13. Port D I/O Logic
DDRD5
5
0
RESET
4
0
0
DDRDx
PDx
3
0
0
MC68HC705P9 — Rev. 4.0
2
0
0
1
0
0
MOTOROLA
Bit 0
0
0
PDx