mc68hc08ln56 Freescale Semiconductor, Inc, mc68hc08ln56 Datasheet - Page 105

• Manufacturer Part Number: mc68hc08ln56
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

TSTOP — TIM Stop Bit
TRST — TIM Reset Bit
PS[2:0] — Prescaler Select Bits
Freescale Semiconductor
This read/write bit stops the TIM counter. Counting resumes when TSTOP is cleared. Reset sets the
TSTOP bit, stopping the TIM counter until software clears the TSTOP bit.
Setting this write-only bit resets the TIM counter and the TIM prescaler. Setting TRST has no effect on
any other registers. Counting resumes from $0000. TRST is cleared automatically after the TIM
counter is reset and always reads as logic zero. Reset clears the TRST bit.
These read/write bits select either the PTE4/TCLK pin or one of the seven prescaler outputs as the
input to the TIM counter as
1 = TIM counter stopped
0 = TIM counter active
1 = Prescaler and TIM counter cleared
0 = No effect
Do not set the TSTOP bit before entering wait mode if the TIM is required
to exit wait mode.
Setting the TSTOP and TRST bits simultaneously stops the TIM counter at
a value of $0000.
MC68HC08LN56 • MC68HC708LN56 General Release Specification, Rev. 2.1
PS[2:0]
000
001
010
011
100
101
110
111
Table 10-2
Table 10-2. Prescaler Selection
shows. Reset clears the PS[2:0] bits.
NOTE
NOTE
Internal Bus Clock ÷ 16
Internal Bus Clock ÷ 32
Internal Bus Clock ÷ 64
Internal Bus Clock ÷ 2
Internal Bus Clock ÷ 4
Internal Bus Clock ÷ 8
Internal Bus Clock ÷1
TIM Clock Source
PTE4/TCLK
I/O Registers
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