MC68HC08AZ32A Datasheet, PDF (306/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

I/O Ports
Freescale Semiconductor, Inc.
READ DDRD ($0007)
WRITE DDRD ($0007)
RESET
WRITE PTD ($0003)
READ PTD ($0003)
DDRDx
PTDx
PTDx
Figure 19-12. Port D I/O Circuit
regardless of the state of its data direction bit. Table 19-5 summarizes
the operation of the port D pins.
Table 19-5. Port D Pin Functions
DDRD Bit
PTD Bit
I/O Pin Mode
Accesses to
DDRD
Read/Write
0
X⁽¹⁾
Input, Hi-Z⁽²⁾
DDRD[7:0]
1
X
Output
DDRD[7:0]
1. X = don’t care
2. Hi-Z = high impedance
3. Writing affects data register, but does not affect input.
Accesses to PTD
Read
Pin
PTD[7:0]
Write
PTD[7:0]⁽³⁾
PTD[7:0]
Technical Data
306
MC68HC08AZ32A — Rev 1.0
I/O Ports
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