MC68HC05L28 Datasheet, PDF (69/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

6.3
Timer during WAIT mode
In WAIT mode all CPU action is suspended, whereas the timer continues to run.
6.4
Timer during STOP mode
In the STOP mode all MCU clocks are stopped, so the timer stops counting. If STOP is exited by
an interrupt the counter retains the last count value. If the device is reset, the counter is forced to
$FFFC. During STOP, if at least one valid input capture edge occurs at the TCAP pins, the input
capture detect circuit is armed. This does not set any timer flags nor wake up the MCU. When the
MCU does wake up, however, there is an active input capture flag and data from the first valid edge
that occurred during the STOP period. If the device is reset to exit STOP mode, no input capture
flag or data remains, even if a valid input capture edge occurred.
6
6.5
Timer state diagrams
The relationships between the internal clock signals, the counter contents and the status of the
flag bits are shown in the following diagrams. It should be noted that the signals labelled ‘internal’
(processor clock, timer clocks and reset) are not available to the user.
MC68HC05L28
16-BIT PROGRAMMABLE TIMER
TPG
MOTOROLA
6-13