MC68HC908QY4A_10 Datasheet, PDF (23/200 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Direct Page Registers
Addr.
$0000
$0001
$0002
↓
$0003
Register Name
Port A Data Register
(PTA)
See page 104.
Read:
Write:
Reset:
Port B Data Register
(PTB)
See page 106.
Read:
Write:
Reset:
Bit 7
R
PTB7
Reserved
6
AWUL
5
PTA5
PTB6
PTB5
4
3
PTA4
PTA3
Unaffected by reset
PTB4
PTB3
Unaffected by reset
2
PTA2
PTB2
1
PTA1
PTB1
Bit 0
PTA0
PTB0
$0004
$0005
$0006
↓
$000A
Data Direction Register A
(DDRA)
See page 104.
Read:
Write:
Reset:
Data Direction Register B
(DDRB)
See page 107.
Read:
Write:
Reset:
R
0
DDRB7
0
Reserved
R
0
DDRB6
0
DDRA5
0
DDRB5
0
DDRA4
0
DDRB4
0
DDRA3
0
DDRB3
0
0
0
DDRB2
0
DDRA1
0
DDRB1
0
DDRA0
0
DDRB0
0
$000B
$000C
$000D
↓
$0019
Port A Input Pullup Enable
Register (PTAPUE)
See page 105.
Read:
Write:
Reset:
OSC2EN
0
Port B Input Pullup Enable
Register (PTBPUE)
See page 108.
Read:
PTBPUE7
Write:
Reset: 0
Reserved
0
PTAPUE5
0
0
PTBPUE6 PTBPUE5
0
0
PTAPUE4
0
PTBPUE4
0
PTAPUE3
0
PTBPUE3
0
PTAPUE2
0
PTBPUE2
0
PTAPUE1
0
PTBPUE1
0
PTAPUE0
0
PTBPUE0
0
Keyboard Status and ^Read:
0
$001A Control Register (KBSCR) Write:
See page 87. _Reset:
0
Keyboard Interrupt ^Read:
0
$001B Enable Register (KBIER) Write:
See page 88. _Reset:
0
Keyboard Interrupt Polarity ^Read:
0
$001C
Register (KBIPR) Write:
See page 88. _Reset:
0
0
0
0
0
AWUIE KBIE5
0
0
0
KBIP5
0
0
= Unimplemented
0
KEYF
0
IMASKK MODEK
ACKK
0
0
0
0
0
KBIE4 KBIE3 KBIE2 KBIE1 KBIE0
0
0
0
0
0
KBIP4 KBIP3 KBIP2 KBIP1 KBIP0
0
0
0
0
0
R = Reserved U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 5)
MC68HC908QYA/QTA Family Data Sheet, Rev. 3
Freescale Semiconductor
23