mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 294

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Input/Output (I/O) Ports
19.2 Introduction
Data Sheet
294
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
Data Direction Register A
Data Direction Register B
Register Name
Port A Data Register
Port B Data Register
Port C Data Register
Port D Data Register
NOTE:
(DDRA)
(DDRB)
(PTC)
(PTD)
(PTA)
(PTB)
Thirty-nine (39) bidirectional input-output (I/O) pins form five 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.
SS
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Figure 19-1. Port I/O Register Summary
. Although the I/O ports do not require termination for proper
DDRA7
DDRB7
PTD7
PTA7
PTB7
Bit 7
0
0
0
Input/Output (I/O) Ports
= Unimplemented
DDRA6
DDRB6
PTC6
PTA6
PTB6
PTD6
6
0
0
DDRA5
DDRB5
PTA5
PTB5
PTC5
PTD5
5
0
0
Unaffected by reset
Unaffected by reset
Unaffected by reset
Unaffected by reset
DDRA4
DDRB4
PTA4
PTB4
PTC4
PTD4
4
0
0
DDRA3
DDRB3
PTA3
PTB3
PTC3
PTD3
3
0
0
MC68HC908LD64
DDRA2
DDRB2
PTA2
PTB2
PTC2
PTD2
Freescale Semiconductor
2
0
0
DDRA1
DDRB1
PTA1
PTB1
PTC1
PTD1
1
0
0
—
Rev. 3.0
DDRA0
DDRB0
PTA0
PTB0
PTC0
PTD0
Bit 0
DD
0
0
or