mc68hc08ln56 Freescale Semiconductor, Inc, mc68hc08ln56 Datasheet - Page 165

• Manufacturer Part Number: mc68hc08ln56
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 13
I/O Ports
13.1 Introduction
Forty two (42) bidirectional input-output (I/O) pins form six parallel ports. All I/O pins are programmable
as inputs or outputs.
Freescale Semiconductor
Data Direction Register A
Data Direction Register B
Data Direction Register C
Data Direction Register D
Data Direction Register E
Data Direction Register F
Register Name
Port C Data Register
Port D Data Register
Port A Data Register
Port B Data Register
Port E Data Register
Port F Data Register
Connect any unused I/O pins to an appropriate logic level, either V
Although the I/O ports do not require termination for proper operation,
termination reduces excess current consumption and the possibility of
electrostatic damage.
MC68HC08LN56 • MC68HC708LN56 General Release Specification, Rev. 2.1
(DDRA)
(DDRB)
(DDRC)
(DDRD)
(DDRE)
(DDRF)
(PTA)
(PTB)
(PTC)
(PTD)
(PTE)
(PTF)
DDRA7
DDRB7
DDRD7
PTD7
PTA7
PTB7
Bit 7
0
0
0
0
0
0
DDRC6
DDRD6
DDRA6
DDRB6
DDRE6
PTA6
PTB6
PTC6
PTD6
PTE6
6
0
0
Figure 13-1. I/O Ports
DDRA5
DDRB5
DDRC5
DDRD5
DDRE5
PTC5
PTD5
PTA5
PTB5
PTE5
5
0
0
NOTE
DDRA4
DDRB4
DDRC4
DDRD4
DDRE4
PTA4
PTB4
PTC4
PTD4
PTE4
4
0
0
DDRA3
DDRB3
DDRC3
DDRD3
DDRE3
DDRF3
PTC3
PTD3
PTA3
PTB3
PTE3
PTF3
3
DDRA2
DDRB2
DDRC2
DDRD2
DDRE2
DDRF2
PTA2
PTB2
PTC2
PTD2
PTE2
PTF2
2
DDRA1
DDRB1
DDRC1
DDRD1
DDRE1
DDRF1
PTC1
PTD1
PTE1
PTA1
PTB1
PTF1
1
DD
or V
DDRA0
DDRB0
DDRC0
DDRD0
DDRE0
DDRF0
PTA0
PTB0
PTC0
PTD0
PTE0
PTF0
Bit 0
SS
.
$000C
$000D
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0005
$0008
$0009
Addr.
165