mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 191

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
NOTE:
NOTE:
TSTOP — TIM Stop Bit
Do not set the TSTOP bit before entering wait mode if the TIM is required
to exit wait mode.
TRST — TIM Reset Bit
Setting the TSTOP and TRST bits simultaneously stops the TIM counter
at a value of $0000.
PS[2:0] — Prescaler Select Bits
PS2
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 0. Reset clears the
TRST bit.
These read/write bits select either the PTE0/TCLK pin or one of the
seven prescaler outputs as the input to the TIM counter as
Table 11-2
0
0
0
0
1
1
1
1
1 = TIM counter stopped
0 = TIM counter active
1 = Prescaler and TIM counter cleared
0 = No effect
PS1
Timer Interface Module (TIM)
0
0
1
1
0
0
1
1
shows. Reset clears the PS[2:0] bits.
PS0
Table 11-2. Prescaler Selection
0
1
0
1
0
1
0
1
Internal Bus Clock 1
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
TIM Clock Source
PTE0/TCLK
2
8
16
32
64
4
Timer Interface Module (TIM)
Technical Data
I/O Registers
191