Fujitsu MB91460 SERIES FR60 User Manual page 802

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")
WAIT
Counter: Retains value
Indeterminate until load
786
Figure 5-1 Status Transition Diagram
Reset
STOP CNTE=0,WAIT=1
Counter: Retains value
when stopped
Indeterminate after reset
CNTE="1"
TRG="0"
CNTE=1,WAIT=1
RELD
when stopped
after reset
TRG="1"
LOAD CNTE=1,WAIT=0
Load reload register
content to counter
Status Transition from Hardware
Status Transition from Register Access
CNTE="1"
TRG="1"
RUN CNTE=1,WAIT=0
.
Counter: Operation
UF
TRG="1"
RELD-UF
Finish load