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Counter state transitions, Figure 3-3 counter state transitions – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 40 Pulse Frequency Modulator

3.Reload Counter Operation

Counter state transitions

Figure 3-3 Counter State Transitions

Reset

State transitions by hardware
State transitions by register access

Counter: Stores the value when

counting stopped.
Indeterminate after a reset.

Counter: Stores the value when

counting stopped.
Indeterminate after a reset
until loaded.

Counter: Running

Load contents of the reload
register to the counter.

Load complete

CNTE= "0"

CNTE= "1"

CNTE= "1"

CNTE= "0"

TRG= "0"

TRG= "1"

TRG= "1"

TRG= "1"

RELD

UF

STOP

WAIT

RUN

CNTE= "0", WAIT= "1"

CNTE= "1", WAIT="1"

CNTE= "1", WAIT= "0"

LOAD

RELD

UF

CNTE= "1", WAIT= "0"