MC908AP8CFBE Datasheet, PDF (271/324 Pages) Freescale Semiconductor, Inc – Microcontrollers

Table 16-5 summarizes the operation of the port D pins.
Table 16-5. 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
Write
Pin
PTD[7:0]⁽³⁾
PTD[7:0]
PTD[7:0]
Port D
MC68HC908AP Family Data Sheet, Rev. 4
Freescale Semiconductor
269