MC68HC908QL4 Datasheet, PDF (27/226 Pages) Motorola, Inc – Microcontrollers

Addr.
$0000
$0001
$0002
↓
$0003
Direct Page Registers
Register Name
Port A Data Register ^Read:
(PTA) Write:
See page 112. _Reset:
Port B Data Register ^Read:
(PTB) Write:
See page 114. _Reset:
Bit 7
0
U
PTB7
Reserved
6
AWUL
0
PTB6
5
PTA5
U
PTB5
4
3
PTA4
PTA3
U
U
PTB4
PTB3
Unaffected by reset
2
PTA2
U
PTB2
1
PTA1
U
PTB1
Bit 0
PTA0
U
PTB0
$0004
$0005
$0006
↓
$000A
Data Direction Register A ^Read:
(DDRA) Write:
See page 112. _Reset:
Data Direction Register B ^Read:
(DDRB) Write:
See page 115. _Reset:
0
0
DDRB7
0
Reserved
0
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/Down ^Read:
Enable Register (PTAPUE) Write:
See page 113. _Reset:
OSC2EN
0
0
PTAPUE5 PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
0
0
0
0
0
0
0
Port B Input Pullup Enable ^Read: _PTBPUE7
Register (PTBPUE) Write:
See page 116. _Reset:
0
PTBPUE6
0
PTBPUE5
0
PTBPUE4
0
PTBPUE3
0
PTBPUE2
0
PTBPUE1
0
PTBPUE0
0
Reserved
Keyboard Status and ^Read:
0
0
0
0
KEYF
0
IMASKK MODEK
$001A Control Register (KBSCR) Write:
ACKK
See page 94. _Reset:
0
0
0
0
0
0
0
0
Keyboard Interrupt ^Read:
0
$001B Enable Register (KBIER) Write:
See page 95. _Reset:
0
AWUIE
0
KBIE5
0
KBIE4
0
KBIE3
0
KBIE2
0
KBIE1
0
KBIE0
0
= Unimplemented
R = Reserved U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 7)
MC68HC908QL4 Data Sheet, Rev. 7
Freescale Semiconductor
27