MC68HLC908QY4 Datasheet, PDF (26/182 Pages) Motorola, Inc – Microcontrollers

Memory
Addr.
$0005
$0006
↓
$000A
Register Name
Bit 7
Read:
Data Direction Register B
(DDRB) Write:
See page 101. _Reset:
DDRB7
0
Unimplemented
6
DDRB6
0
5
DDRB5
0
4
DDRB4
0
3
DDRB3
0
2
DDRB2
0
1
DDRB1
0
Bit 0
DDRB0
0
$000B
$000C
$000D
↓
$0019
Port A Input Pullup Enable ^Read:
Register (PTAPUE) Write:
See page 99.
Reset:
OSC2EN
0
0
PTAPUE5 PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
0
0
0
0
0
0
0
Read:
Port B Input Pullup Enable
PTBPUE7
Register (PTBPUE) Write:
See page 102. _Reset:
0
PTBPUE6
0
PTBPUE5
0
PTBPUE4
0
PTBPUE3
0
PTBPUE2
0
PTBPUE1
0
PTBPUE0
0
Unimplemented
Read: 0
Keyboard Status and
$001A Control Register (KBSCR) Write:
See page 83.
Reset: 0
Keyboard Interrupt ^Read:
0
$001B Enable Register (KBIER) Write:
See page 84. _Reset:
0
$001C
Unimplemented
0
0
AWUIE
0
0
0
KBIE5
0
0
0
KBIE4
0
KEYF
0
KBIE3
0
0
ACKK
0
IMASKK MODEK
0
0
KBIE2 KBIE1 KBIE0
0
0
0
$001D
$001E
Read: 0
0
0
0
IRQF
0
IRQ Status and Control
Register (INTSCR) Write:
ACK
See page 77. _Reset:
0
0
0
0
0
0
Configuration Register 2 ^Read:
(CONFIG2)⁽¹⁾ Write:
See page 53. _Reset:
IRQPUD
0
IRQEN
0
R OSCOPT1 OSCOPT0 R
0
0
0
0
1. One-time writable register after each reset.
2. RSTEN reset to 0 by a power-on reset (POR) only.
IMASK MODE
0
0
R
RSTEN
0
0⁽²⁾
= Unimplemented
R = Reserved U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 2 of 6)
MC68HLC908QY/QT Family Data Sheet, Rev. 3
26
Freescale Semiconductor