MC68HC908AS60MFN MOTOROLA [Motorola, Inc], MC68HC908AS60MFN Datasheet - Page 302
![no-image](/images/no-image-200.jpg)
MC68HC908AS60MFN
Manufacturer Part Number
MC68HC908AS60MFN
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AS60MFN.pdf
(454 pages)
- Current page: 302 of 454
- Download datasheet (6Mb)
Input/Output (I/O) Ports
20.2 Introduction
Technical Data
302
$0000
$0001
$0002
$0003
$0004
$0005
$0006
Addr.
Data Direction Register C
Data Direction Register A
Data Direction Register B
NOTE:
Port C Data Register
Port D Data Register
Port A Data Register
Port B Data Register
Register Name
See page 304.
See page 306.
See page 308.
See page 311.
See page 304.
See page 307.
See page 309.
(DDRC)
(DDRA)
(DDRB)
Forty bidirectional input/output (I/O) pins form six parallel ports. All I/O
pins are programmable as inputs or outputs.
Connect any unused I/O pins to an appropriate logic level, either V
V
operation, termination reduces excess current consumption and the
possibility of electrostatic damage.
(PTC)
(PTD)
(PTA)
(PTB)
SS
Figure 20-1. I/O Port Register Summary
Freescale Semiconductor, Inc.
. Although the I/O ports do not require termination for proper
For More Information On This Product,
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Write:
Write:
Write:
MCLKEN
DDRA7
DDRB7
PTA7
PTB7
PTD7
Bit 7
Go to: www.freescale.com
R
R
0
0
0
Input/Output (I/O) Ports
= Reserved
DDRA6
DDRB6
PTA6
PTB6
PTD6
R
R
6
0
0
0
0
DDRA5
DDRB5
DDRC5
PTA5
PTB5
PTC5
PTD5
5
0
0
Unaffected by reset
Unaffected by reset
Unaffected by reset
Unaffected by reset
Unaffected by reset
DDRA4
DDRB4
DDRC4
PTD4
PTA4
PTB4
PTC4
4
0
0
DDRA3
DDRB3
DDRC3
PTA3
PTB3
PTC3
PTD3
3
0
0
MC68HC908AS60 — Rev. 1.0
DDRA2
DDRB2
DDRC2
PTA2
PTB2
PTC2
PTD2
2
0
0
DDRC1
DDRA1
DDRB1
PTC1
PTD1
PTA1
PTB1
1
0
0
MOTOROLA
DDRA0
DDRB0
DDRC0
DD
PTA0
PTB0
PTC0
PTD0
Bit 0
0
0
or
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