mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 390

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

Input/Output (I/O) Ports
18.6 Port D
18.6.1 Port D Data Register (PTD)
Data Sheet
390
Alternative Function:
* These port pins are shared with two other modules. For each of the pins, ONLY enable ONE module at any one
time to avoid pin contention.
Address:
Port D is an 8-bit special function port that shares its pins with the serial
peripheral interface (SPI) module, keyboard interrupt module, RTC
module, MMIIC module, and timer modules.
The port D data register contains a data latch for each of the eight port D
pins.
PTD[7:0] — Port D Data Bits
KBI[7:4] — Keyboard Interrupt Channels 7 to 4
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.
KBI[7:4] are pins used for the keyboard interrupt input. The
corresponding input, KBI[7:4], can be enabled in the keyboard
interrupt enable register, KBIER. Port pins used as KBI input will
override any control from the port I/O logic. See
Keyboard Interrupt Module
$0003
PTD7
KBI7/
SDA*
Bit 7
Figure 18-13. Port D Data Register (PTD)
Input/Output (I/O) Ports
PTD6
KBI6/
SCL*
6
T2CLK*
PTD5
KBI5/
5
Unaffected by reset
T1CLK*
(KBI).
PTD4
KBI4/
4
CALOUT*
SPSCK/
PTD3
MC68HC908LJ24/LK24 — Rev. 2.1
3
PTD2
MOSI
Freescale Semiconductor
2
Section 20.
PTD1
MISO
1
CALIN*
PTD0
Bit 0
SS/