Datasheet

Memory
MC68HC908QY/QT Family Data Sheet, Rev. 6
28 Freescale Semiconductor
$0006
↓
$000A
Unimplemented
Unimplemented
$000B
Port A Input Pullup Enable
Register (PTAPUE)
See page 99.
Read:
OSC2EN
0
PTAPUE5 PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
Write:
Reset:00000000
$000C
Port B Input Pullup Enable
Register (PTBPUE)
See page 102.
Read:
PTBPUE7 PTBPUE6 PTBPUE5 PTBPUE4 PTBPUE3 PTBPUE2 PTBPUE1 PTBPUE0
Write:
Reset:00000000
$000D
↓
$0019
Unimplemented
$001A
Keyboard Status and
Control Register (KBSCR)
See page 83.
Read: 0 0 0 0 KEYF 0
IMASKK MODEK
Write: ACKK
Reset:00000000
$001B
Keyboard Interrupt
Enable Register (KBIER)
See page 84.
Read: 0
AWUIE KBIE5 KBIE4 KBIE3 KBIE2 KBIE1 KBIE0
Write:
Reset:00000000
$001C Unimplemented
$001D
IRQ Status and Control
Register (INTSCR)
See page 77.
Read: 0 0 0 0 IRQF 0
IMASK MODE
Write: ACK
Reset:00000000
$001E
Configuration Register 2
(CONFIG2)
(1)
See page 53.
Read:
IRQPUD IRQEN R OSCOPT1 OSCOPT0 R R RSTEN
Write:
Reset:00000000
(2)
1. One-time writable register after each reset.
2. RSTEN reset to 0 by a power-on reset (POR) only.
$001F
Configuration Register 1
(CONFIG1)
(1)
See page 54.
Read:
COPRS LVISTOP LVIRSTD LVIPWRD LVI5OR3 SSREC STOP COPD
Write:
Reset:00000
(2)
000
1. One-time writable register after each reset.
2. LVI5OR3 reset to 0 by a power-on reset (POR) only.
$0020
TIM Status and Control
Register (TSC)
See page 127.
Read: TOF
TOIE TSTOP
00
PS2 PS1 PS0
Write: 0 TRST
Reset:00100000
$0021
TIM Counter Register High
(TCNTH)
See page 128.
Read: Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
Write:
Reset:00000000
Addr.Register Name Bit 7654321Bit 0
= Unimplemented R = Reserved U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 2 of 5)