MC68HC705J MOTOROLA [Motorola, Inc], MC68HC705J Datasheet - Page 35

• Manufacturer Part Number: MC68HC705J
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

2.4 Input/Output Register Summary
MC68HC705J1A — Rev. 4.0
MOTOROLA
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
Data Direction Register A
Data Direction Register B
Timer Status and Control
Port A Data Register
Port B Data Register
Register Name
Register (TSCR)
Unimplemented
Unimplemented
Unimplemented
Unimplemented
See page 112.
See page 89.
See page 92.
See page 90.
See page 93.
(PORTA)
(PORTB)
(DDRA)
(DDRB)
Figure 2-2. I/O Register Summary (Sheet 1 of 3)
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Write:
DDRA7
Bit 7
TOF
PA7
0
0
0
0
0
= Unimplemented
DDRA6
RTIF
PA6
6
0
0
0
0
0
Memory
DDRA5
DDRB5
TOIE
PA5
PB5
5
0
0
0
R = Reserved
DDRA4
Unaffected by reset
Unaffected by reset
DDRB4
RTIE
PA4
PB4
4
0
0
0
DDRA3
DDRB3
TOFR
PA3
PB3
3
0
0
0
0
Input/Output Register Summary
DDRA2
DDRB2
RTIFR
PA2
PB2
2
0
0
0
0
DDRA1
DDRB1
PA1
PB1
RT1
1
0
0
1
Technical Data
DDRA0
Memory
DDRB0
Bit 0
PA0
PB0
RT0
0
0
1
35