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PTE0/TCLKB
INTERNAL
PRESCALER
BUS CLOCK
TSTOP
TRST
16-BIT COUNTER
16-BIT COMPARATOR
TMODH:TMODL
CHANNEL 0
16-BIT COMPARATOR
TCH0H:TCH0L
16-BIT LATCH
CHANNEL 1
16-BIT COMPARATOR
TCH1H:TCH1L
16-BIT LATCH
Addr.
Register Name
TIMB Status/Control Register
$0051
See page 244.
TIMB Counter Register High
$0052
See page 246.
TIMB Counter Register Low
$0053
See page 246.
TIMB Counter Modulo Register
$0054
High (TBMODH)
See page 246.
TIMB Counter Modulo Register
$0055
Low (TBMODL)
See page 246.
Freescale Semiconductor
TCLK
PRESCALER SELECT
PS2
ELS0B
ELS0A
MS0A
ELS1B
ELS1A
MS1A
Figure 17-2. TIMB Block Diagram
Bit 7
Read:
TOF
(TBSC)
Write:
0
Reset:
0
Read:
Bit 15
(TBCNTH)
Write:
R
Reset:
0
Read:
Bit 7
(TBCNTL)
Write:
R
Reset:
0
Read:
Bit 15
Write:
Reset:
1
Read:
Bit 7
Write:
Reset:
1
R
= Reserved
Figure 17-3. TIMB I/O Register Summary
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
PS1
PS0
CH0F
MS0B
CH1F
6
5
4
0
TOIE
TSTOP
TRST
0
1
0
Bit 14
Bit 13
Bit 12
R
R
R
0
0
0
Bit 6
Bit 5
Bit 4
R
R
R
0
0
0
Bit 14
Bit 13
Bit 12
1
1
1
Bit 6
Bit 5
Bit 4
1
1
1
Functional Description
INTER-
TOF
RUPT
LOGIC
TOIE
TOV0
PTE1
CH0MAX
LOGIC
INTER-
RUPT
LOGIC
CH0IE
TOV1
PTE2
CH1MAX
LOGIC
INTER-
RUPT
LOGIC
CH1IE
3
2
0
PS2
PS1
R
0
0
Bit 11
Bit 10
Bit 9
R
R
0
0
Bit 3
Bit 2
Bit 1
R
R
0
0
Bit 11
Bit 10
Bit 9
1
1
Bit 3
Bit 2
Bit 1
1
1
PTE1/TCH0B
PTE2/TCH1B
1
Bit 0
PS0
0
0
Bit 8
R
R
0
0
Bit 0
R
R
0
0
Bit 8
1
1
Bit 0
1
1
237
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