MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 367
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MC68HC908AZ32ACFU
Manufacturer Part Number
MC68HC908AZ32ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AZ32ACFU.pdf
(468 pages)
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23.3 Port A
23.3.1 Port A Data Register
23.3.2 Data Direction Register A
68HC908AZ32A — Rev 0.0
MOTOROLA
Address:
Address:
Port A is an 8-bit general-purpose bidirectional I/O port.
The port A data register contains a data latch for each of the eight
port A pins.
PTA[7:0] — Port A Data Bits
Data direction register A determines whether each port A pin is an input
or an output. Writing a logic 1 to a DDRA bit enables the output buffer for
the corresponding port A pin; a logic 0 disables the output buffer.
Reset:
Reset:
Read:
Read:
Write:
Write:
Freescale Semiconductor, Inc.
These read/write bits are software programmable. Data direction of
each port A pin is under the control of the corresponding bit in data
direction register A. Reset has no effect on port A data.
For More Information On This Product,
DDRA7
$0000
$0004
PTA7
Bit 7
Bit 7
0
Figure 23-3. Data Direction Register A (DDRA)
Go to: www.freescale.com
Figure 23-2. Port A Data Register (PTA)
DDRA6
PTA6
6
6
0
I/O Ports
DDRA5
PTA5
5
5
0
Unaffected by Reset
DDRA4
PTA4
4
4
0
DDRA3
PTA3
3
3
0
DDRA2
PTA2
2
2
0
Advance Information
DDRA1
PTA1
1
1
0
I/O Ports
DDRA0
PTA0
Bit 0
Bit 0
Port A
0
367
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