MC68HC708MP16CFU

Manufacturer Part NumberMC68HC708MP16CFU
ManufacturerFreescale Semiconductor, Inc
MC68HC708MP16CFU datasheet
 
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Page 216/398

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Timer Interface Module A (TIMA)
TSTOP — TIMA Stop Bit
This read/write bit stops the TIMA counter. Counting resumes when
TSTOP is cleared. Reset sets the TSTOP bit, stopping the TIMA
counter until software clears the TSTOP bit.
1 = TIMA counter stopped
0 = TIMA counter active
NOTE:
Do not set the TSTOP bit before entering wait mode if the TIMA is
required to exit wait mode.
TRST — TIMA Reset Bit
Setting this write-only bit resets the TIMA counter and the TIMA
prescaler. Setting TRST has no effect on any other registers.
Counting resumes from $0000. TRST is cleared automatically after
the TIMA counter is reset and always reads as logic 0. Reset clears
the TRST bit.
1 = Prescaler and TIMA counter cleared
0 = No effect
NOTE:
Setting the TSTOP and TRST bits simultaneously stops the TIMA
counter at a value of $0000.
PS[2:0] — Prescaler Select Bits
These read/write bits select either the PTE0/TCLKA pin or one of the
seven prescaler outputs as the input to the TIMA counter as
Table 11-1
Technical Data
216
shows. Reset clears the PS[2:0] bits.
Table 11-1. Prescaler Selection
PS[2:0]
TIMA Clock Source
Internal Bus Clock ÷1
000
Internal Bus Clock ÷ 2
001
Internal Bus Clock ÷ 4
010
Internal Bus Clock ÷ 8
011
Internal Bus Clock ÷ 16
100
Internal Bus Clock ÷ 32
101
Internal Bus Clock ÷ 64
110
111
Timer Interface Module A (TIMA)
PTE0/TCLKA
MC68HC708MP16
Rev. 3.1
Freescale Semiconductor