MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 80
MC68HC711PH8
Manufacturer Part Number
MC68HC711PH8
Description
High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
Manufacturer
Motorola
Datasheet
1.MC68HC711PH8.pdf
(264 pages)
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4
4.1
Port A is an 8-bit bidirectional port, with both data and data direction registers. In addition to their
I/O capability, port A pins are shared with timer functions, as shown in the following table.
On reset the pins are configured as general purpose high-impedance inputs.
4.1.1
This is a read/write register and is not affected by reset. The bits may be read and written at any
time, but, when a pin is allocated to its alternate function, a write to the corresponding register bit
has no effect on the pin state.
4.1.2
DDA[7:0] — Data direction for port A
MOTOROLA
4-2
Data direction A (DDRA)
Port A data (PORTA)
1 (set)
0 (clear) –
Port A
PORTA — Port A data register
DDRA — Data direction register for port A
–
The corresponding pin is configured as an output.
The corresponding pin is configured as an input.
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
Pin
Address
Address
$0000
$0001
IC3
IC2
IC1
OC5 and/or OC1, or IC4
OC4 and/or OC1
OC3 and/or OC1
OC2 and/or OC1
PAI and/or OC1
PARALLEL INPUT/OUTPUT
Alternate function
DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 0000 0000
bit 7
bit 7
PA7
bit 6
bit 6
PA6
bit 5
bit 5
PA5
bit 4
bit 4
PA4
See Section 8 for
more information.
bit 3
PA3
bit 3
bit 2
bit 2
PA2
bit 1
PA1
bit 1
MC68HC11PH8
bit 0
bit 0
PA0
undeÞned
on reset
on reset
State
State
TPG
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