Freescale Semiconductor, Inc.
Memory Map
I/O Section
2.3 I/O Section
Addresses $0000–$004F, shown in
Figure 2-2,
contain the I/O Data,
Status and Control Registers.
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
$0009
$000A
$000B
$000C
$000D
$000E
$000F
Register Name
Port A Data Register (PTA)
Port B Data Register (PTB)
Port C Data Register (PTC)
Port D Data Register (PTD)
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Bit 7
PTA7
PTB7
0
R
PTD7
6
PTA6
PTB6
0
R
PTD6
DDRA6
DDRB6
0
R
DDRD6
PTE6
PTF6
0
R
0
R
DDRE6
DDRF6
0
R
0
R
5
PTA5
PTB5
PTC5
PTD5
DDRA5
DDRB5
DDRC5
DDRD5
PTE5
PTF5
0
R
0
R
DDRE5
DDRF5
0
R
0
R
4
PTA4
PTB4
PTC4
PTD4
DDRA4
DDRB4
DDRC4
DDRD4
PTE4
PTF4
0
R
0
R
DDRE4
DDRF4
0
R
0
R
3
PTA3
PTB3
PTC3
PTD3
DDRA3
DDRB3
DDRC3
DDRD3
PTE3
PTF3
0
R
0
R
DDRE3
DDRF3
0
R
0
R
2
PTA2
PTB2
PTC2
PTD2
DDRA2
DDRB2
DDRC2
DDR2
PTE2
PTF2
PTG2
0
R
DDRE2
DDRF2
DDRG2
0
R
1
PTA1
PTB1
PTC1
PTD1
DDRA1
DDRB1
DDRC1
DDRD1
PTE1
PTF1
PTG1
PTH1
DDRE1
DDRF1
DDRG1
DDRH1
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
DDRB0
DDRC0
DDRD0
PTE0
PTF0
PTG0
PTH0
DDRE0
DDRF0
DDRG0
DDRH0
Freescale Semiconductor, Inc...
Data Direction Register A Read:
DDRA7
(DDRA) Write:
Data Direction Register B Read:
DDRB7
(DDRB) Write:
Data Direction Register C Read:
MCLKEN
(DDRC) Write:
Data Direction Register D Read:
DDRD7
(DDRD) Write:
Port E Data Register (PTE)
Port F Data Register (PTF)
Port G Data Register (PTG)
Port H Data Register (PTH)
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
PTE7
0
R
0
R
0
R
Data Direction Register E Read:
DDRE7
(DDRE) Write:
Data Direction Register F Read:
(DDRF) Write:
Data Direction Register G Read:
(DDRG) Write:
Data Direction Register H Read:
(DDRH) Write:
0
R
0
R
0
R
Figure 2-2. I/O Data, Status and Control Registers (Sheet 1 of 5)
68HC908AZ32A — Rev 0.0
MOTOROLA
Memory Map
For More Information On This Product,
Go to: www.freescale.com
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MOTOROLA [ MOTOROLA, INC ]
