Datasheet

Port D
MC68HC908AP Family Data Sheet, Rev. 4
Freescale Semiconductor 269
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 Accesses to PTD
Read/Write Read Write
0
X
(1)
1. X = don’t care.
Input, Hi-Z
(2)
2. Hi-Z = high impedance.
DDRD[7:0] Pin
PTD[7:0]
(3)
3. Writing affects data register, but does not affect input.
1 X Output DDRD[7:0] PTD[7:0] PTD[7:0]