MC68HC708MP16 Datasheet, PDF (216/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

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 shows. Reset clears the PS[2:0] bits.
PS[2:0]
000
001
010
011
100
101
110
111
Table 11-1. Prescaler Selection
TIMA Clock Source
Internal Bus Clock ÷1
Internal Bus Clock ÷ 2
Internal Bus Clock ÷ 4
Internal Bus Clock ÷ 8
Internal Bus Clock ÷ 16
Internal Bus Clock ÷ 32
Internal Bus Clock ÷ 64
PTE0/TCLKA
Technical Data
216
Timer Interface Module A (TIMA)
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor