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Chapter 38 Reload Timer
5.Operation
5.8 Operation when Returning from Stop Mode
When returning due to an external interrupt, the reload timer will continue operation from its stopped state.
When returning from a reset (INITX), it will return to the initial state (down counter stopped, no TOT pin
output).
5.9 Status Transition
The status of the counter is decided by the CNTE bit of the reload timer control register and the internal WAIT
signal.
Settable statuses are:
STOP status: Stopped (CNTE=“0”, WAIT=“1”)
WAIT status: Waiting for activation trigger (CNTE=“1”, WAIT=“1”)
RUN status : Count operation running (CNTE=“1”, WAIT=“0”)
LOAD status: Loading value to counter (from RUN/WAIT, TRG=“1” or underflow: CNTE=“1”, WAIT=“0”)
Figure 5-1 Status Transition Diagram
STOP CNTE=0,WAIT=1
Counter: Retains value
when stopped
Indeterminate after reset
Counter: Retains value
when stopped
Indeterminate until load
after reset
Reset
WAIT CNTE=1,WAIT=1 RUN CNTE=1,WAIT=0
Counter: Operation
LOAD CNTE=1,WAIT=0
Load reload register
content to counter
Status Transition from Hardware
Status Transition from Register Access
CNTE="1"
TRG="0"
CNTE="1"
TRG="1"
RELD
UF
TRG="1" TRG="1"
RELD-UF
.
Finish load
