MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 323
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MC68HC908AB32
Manufacturer Part Number
MC68HC908AB32
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AB32.pdf
(392 pages)
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17.6 Port D
17.6.1 Port D Data Register (PTD)
MC68HC908AB32
MOTOROLA
Additional Functions:
Alternative Function:
—
Rev. 1.0
Address:
Port D is an 8-bit special function port that shares two of its pins with the
timer interface module (see
(TIMA)
port D pin has 15mA current drive (sink) and programmable pullup.
The port D data register contains a data latch for each of the eight port D
pins.
PTD[7:0] — Port D Data Bits
TACLK — Timer A Clock Input
TBCLK — Timer B Clock Input
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 pin becomes TACLK, the timer A (TIMA) external clock
input when the TIMA prescaler select bits, PS[2:0] = 111. See
Section 11. Timer Interface Module A
The PTD4 pin becomes TBCLK, the timer B (TIMB) external clock
input when the TIMB prescaler select bits, PS[2:0] = 111. See
Section 12. Timer Interface Module B
Freescale Semiconductor, Inc.
For More Information On This Product,
Input pullup Input pullup Input pullup Input pullup Input pullup Input pullup Input pullup Input pullup
15mA sink 15mA sink 15mA sink 15mA sink 15mA sink 15mA sink 15mA sink 15mA sink
and
$0003
PTD7
Bit 7
Figure 17-11. Port D Data Register (PTD)
Section 12. Timer Interface Module B
Go to: www.freescale.com
Input/Output (I/O) Ports
TACLK
PTD6
6
PTD5
5
Section 11. Timer Interface Module A
Unaffected by reset
TBCLK
PTD4
4
PTD3
3
(TIMA).
(TIMB).
PTD2
2
Input/Output (I/O) Ports
(TIMB)). Each
PTD1
1
Technical Data
PTD0
Bit 0
Port D
323
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