Datasheet

Input/Output (I/O) Section
MC68HC908GP32 Data Sheet, Rev. 10
Freescale Semiconductor 33
$001D
IRQ Status and Control
Register
(INTSCR)
Read: 0000IRQF0
IMASK MODE
Write:
ACK
Reset:00000000
$001E
Configuration Register 2
(CONFIG2)†
Read: 000000
OSC-
STOPENB
SCIBDSRC
Write:
Reset:00000000
$001F
Configuration Register 1
(CONFIG1)
†
Read:
COPRS LVISTOP LVIRSTD LVIPWRD LVI5OR3
†
SSREC STOP COPD
Write:
Reset:00000000
$0020
Timer 1 Status and Control
Register
(T1SC)
Read: TOF
TOIE TSTOP
00
PS2 PS1 PS0
Write: 0 TRST
Reset:00100000
$0021
Timer 1 Counter
Register High
(T1CNTH)
Read: Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset:00000000
$0022
Timer 1 Counter
Register Low
(T1CNTL)
Read: Bit 7 654321Bit 0
Write:
Reset:00000000
$0023
Timer 1 Counter Modulo
Register High
(T1MODH)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset:11111111
$0024
Timer 1 Counter Modulo
Register Low
(T1MODL)
Read:
Bit 7654321Bit 0
Write:
Reset:11111111
$0025
Timer 1 Channel 0 Status and
Control Register (T1SC0)
Read: CH0F
CH0IE MS0B MS0A ELS0B ELS0A TOV0 CH0MAX
Write: 0
Reset:00000000
$0026
Timer 1 Channel 0
Register High
(T1CH0H)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset: Indeterminate after reset
$0027
Timer 1 Channel 0
Register Low
(T1CH0L)
Read:
Bit 7654321Bit 0
Write:
Reset: Indeterminate after reset
† One-time writable register after each reset, except LVI5OR3 bit. LVI5OR3 bit is only reset via POR (power-on reset).
$0028
Timer 1 Channel 1 Status and
Control Register (T1SC1)
Read: CH1F
CH1IE
0
MS1A ELS1B ELS1A TOV1 CH1MAX
Write: 0
Reset:00000000
$0029
Timer 1 Channel 1
Register High
(T1CH1H)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset: Indeterminate after reset
$002A
Timer 1 Channel 1
Register Low
(T1CH1L)
Read:
Bit 7654321Bit 0
Write:
Reset: Indeterminate after reset
Addr. Register Name Bit 7 654321Bit 0
= Unimplemented R = Reserved U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 3 of 6)