mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 329

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC08QA24
Freescale Semiconductor
NOTE:
TRST — TIMB Reset Bit
Setting the TSTOP and TRST bits simultaneously stops the TIMB
counter at a value of $0000.
PS[2:0] — Prescaler Select Bits
Setting this write-only bit resets the TIMB counter and the TIMB
prescaler. Setting TRST has no effect on any other registers.
Counting resumes from $0000. TRST is cleared automatically after
the TIMB counter is reset and always reads as logic 0. Reset clears
the TRST bit.
These read/write bits select either the PTD4 pin or one of the seven
prescaler outputs as the input to the TIMB counter as
shows. Reset clears the PS[2:0] bits.
1 = Prescaler and TIMB counter cleared
0 = No effect
PS[2:0]
000
001
010
011
100
101
110
111
Timer Interface B (TIMB)
Table 21-1. Prescaler Selection
Internal bus clock ÷ 16
Internal bus clock ÷ 32
Internal bus clock ÷ 64
Internal bus clock ÷ 4
Internal bus clock ÷ 2
Internal bus clock ÷ 8
TIMB Clock Source
Internal bus clock ÷1
PTF2/TBCLK
Timer Interface B (TIMB)
Table 21-1
Technical Data
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