
Functional Description
MC68HC908GR60A MC68HC908GR48A MC68HC908GR32A Data Sheet, Rev. 5
Freescale Semiconductor
227
Figure 17-2. TIM1 Block Diagram
Addr.
Register Name
Bit 7
654321
Bit 0
$0020
TIM1 Status and Control
Register (T1SC)
Read:
TOF
TOIE
TSTOP
00
PS2
PS1
PS0
Write:
0
TRST
Reset:
0010000
0
$0021
TIM1 Counter Register High
(T1CNTH)
Read:
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Write:
Reset:
0000000
0
$0022
TIM1 Counter Register Low
(T1CNTL)
Read:
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1
Bit 0
Write:
Reset:
0000000
0
= Unimplemented
Figure 17-3. TIM1 I/O Register Summary
PRESCALER
PRESCALER SELECT
16-BIT COMPARATOR
PS2
PS1
PS0
16-BIT COMPARATOR
16-BIT LATCH
T1CH0H:T1CH0L
MS0A
ELS0B
ELS0A
TOF
TOIE
16-BIT COMPARATOR
16-BIT LATCH
T1CH1H:T1CH1L
CHANNEL 0
CHANNEL 1
T1MODH:T1MODL
TRST
TSTOP
TOV0
CH0IE
CH0F
ELS1B
ELS1A
TOV1
CH1IE
CH1MAX
CH1F
CH0MAX
MS0B
16-BIT COUNTER
IN
TERNAL
BUS
MS1A
INTERNAL
BUS CLOCK
PTD5/T1CH1
PTD4/T1CH0
INTERRUPT
LOGIC
PORT
LOGIC
INTERRUPT
LOGIC
INTERRUPT
LOGIC
PORT
LOGIC