mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 331
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mc68hc908sr12
Manufacturer Part Number
mc68hc908sr12
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908SR12.pdf
(404 pages)
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18.6 Port D
18.6.1 Port D Data Register (PTD)
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
Alternative Function:
Address:
Port D is an 8-bit special function port that shares all of its pins with the
keyboard interrupt module. See
Module
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[7:0] — Keyboard Interrupt 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 keyboard interrupt enable bits, KBIE[7:0], in the keyboard
interrupt enable register (KBIER), enable the port D pins as external
interrupt pins. See
$0003
PTD7
(KBI).
KBI7
Bit 7
Figure 18-13. Port D Data Register (PTD)
Input/Output (I/O) Ports
PTD6
KBI6
6
Section 20. Keyboard Interrupt Module
PTD5
KBI5
5
Unaffected by reset
Section 20. Keyboard Interrupt
PTD4
KBI4
4
PTD3
KBI3
3
PTD2
KBI2
2
Input/Output (I/O) Ports
PTD1
KBI1
1
Data Sheet
(KBI).
PTD0
KBI0
Bit 0
Port D
331
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