MC68HC705C Motorola, MC68HC705C Datasheet - Page 37

• Manufacturer Part Number: MC68HC705C
• Description: HCMOS Microcontroller Unit
• Manufacturer: Motorola

MC68HC705C8A — Rev. 2.0
MOTOROLA
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
$0009
Addr.
Port D Fixed Input Register
Port C Data Direction
Port A Data Direction
Port B Data Direction
Port C Data Register
Port A Data Register
Port B Data Register
Register (DDRA)
Register (DDRB)
Register Name
Unimplemented
Unimplemented
Unimplemented
See page 76.
See page 79.
See page 83.
See page 86.
See page 77.
See page 80.
See page 84.
(PORTC)
(PORTD)
(PORTB)
(PORTA)
(DDRC)
Figure 2-2. I/O Register Summary (Sheet 1 of 4)
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Write:
Write:
Write:
DDRA7 DDRA6
DDRB7 DDRB6
DDRC7 DDRC6
Bit 7
PB7
PC7
PD7
PA7
0
0
0
= Unimplemented
PB6
PC6
PA6
6
0
0
0
Memory
DDRA5
DDRB5
DDRC5
PB5
PC5
PA5
SS
5
0
0
0
U = Unaffected
DDRC4
DDRA4
DDRB4
Unaffected by reset
Unaffected by reset
Unaffected by reset
Unaffected by reset
SCK
PB4
PC4
PA4
4
0
0
0
DDRA3
DDRB3
DDRC3
MOSI
PB3
PC3
PA3
3
0
0
0
DDRA2
DDRB2
DDRC2
MISO
PB2
PC2
PA2
2
0
0
0
Bootloader ROM
DDRA1
DDRB1
DDRC1 DDRC0
TDO
PC1
PB1
Technical Data
PA1
1
0
0
0
Memory
DDRA0
DDRB0
Bit 0
PC0
PA0
PB0
RDI
0
0
0
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