mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 242

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Input/Output (I/O) Ports
17.6 Port D
17.6.1 Port D Data Register
Data Sheet
242
NOTE:
Function:
Address:
Alternate
Port D is an 7-bit special-function port that shares two of its pins with the
multi-master IIC (MMIIC) module, one of its pins with the sync processor,
two of its pins with the DDC12AB module, and two of its pins with the
USB module.
PTD1–PTD0 are 3.3V pins.
The port D data register (PTD) contains a data latch for each of the eight
port D pins.
PTD6–PTD0 — Port D Data Bits
IICSDA, IICSCL — Multi-master IIC Data and Clock pins
Reset:
Read:
Write:
These read/write bits are software-programmable. Data direction of
each port D pin is under the control of the corresponding bit in data
direction register D. Reset has no effect on port D data.
The PTD6/IICSDA and PTD5/IICSCL pins are multi-master IIC data
and clock pins. When the IICDATE and IICSCLE bits in the port D
configuration register (PDCR) is clear, the PTD6/IICSDA and
PTD5/IICSCL pins are available for general-purpose I/O. See
Port D
$0003
Bit 7
Options.
0
Figure 17-12. Port D Data Register (PTD)
Input/Output (I/O) Ports
= Unimplemented
IICSDA
PTD6
6
IICSCL
PTD5
5
Unaffected by reset
CLAMP
PTD4
4
DDCSCL DDCSDA
PTD3
3
MC68HC908BD48
PTD2
Freescale Semiconductor
2
PTD1
D–
1
—
17.6.3
Rev. 2.1
PTD0
Bit 0
D+