MC68HC705MC4 Datasheet, PDF (61/99 Pages) Motorola, Inc – Microcontrollers

MC68HC705MC4 Specification Rev. 1.5
8.6 TIMER OPERATION DURING WAIT/HALT MODES
During WAIT modes, the 16-bit timer continues to operate normally and may generate an
interrupt to trigger the MCU out of the WAIT mode.
8.7 TIMER OPERATION DURING STOP MODE
When the MCU enters the Stop Mode, the free-running counter stops counting (the
internal clock is stopped). It remains at that particular count value until the Stop Mode is
exited by applying an active signal to the IRQ pin, at which time the counter resumes from
its stopped value as if nothing had happened. If Stop Mode is exited via an external
RESET (logic low applied to the RESET pin) the counter is forced to $FFFC.
If a valid input capture edge occurs at either of the TCAP pins during Stop Mode, the input
capture detect circuitry will be armed. This action does not set any flags or “wake up” the
MCU, but when the MCU does “wake up” there will be an active input capture flag (and
data) from the first valid edge. If the Stop Mode is exited by an external RESET, no input
capture flag or data will be present even if a valid input capture edge was detected during
the Stop Mode.
MOTOROLA
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Section 8: 16-Bit Timer