mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 393

• Manufacturer Part Number: mc68hc908lj24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
When DDRDx is a logic 1, reading address $0003 reads the PTDx data
latch. When DDRDx is a logic 0, reading address $0003 reads the
voltage level on the pin. The data latch can always be written, regardless
of the state of its data direction bit.
Table 18-5
Notes:
1. X = don’t care.
2. Hi-Z = high impedance.
3. Writing affects data register, but does not affect input.
DDRD
Bit
0
1
PTD Bit
X
summarizes the operation of the port D pins.
X
(1)
Input/Output (I/O) Ports
Table 18-5. Port D Pin Functions
Input, Hi-Z
I/O Pin Mode
Output
(2)
Accesses to DDRD
DDRD[7:0]
DDRD[7:0]
Read/Write
PTD[7:0]
Input/Output (I/O) Ports
Read
Pin
Accesses to PTD
PTD[7:0]
PTD[7:0]
Data Sheet
Write
Port D
(3)
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