Figure 8.7 Counter Operation During Standby Modes Or Operation Halt; States In Each Mode During Pulse Width Count; Timer Operation - Fujitsu F2MC-8L MB89620 Series Hardware Manual

7
8. States in Each Mode during Pulse Width Count Timer
Operation
This section describes the operation of the pulse width count timer when the device
changes to sleep or stop mode or an operation halt request occurs during operation.
n Operation during Standby Mode or Operation Halt
Figure 8.7 shows the counter value state when the device changes to sleep or stop mode, or an
operation halt request occurs, during operation of the interval timer function or pulse width
measurement function.
The counter halts and maintains its current value when the device changes to stop mode.
Operation starts again from the stored counter value after wake-up from stop mode by an
external interrupt. Therefore, the first interval time or pulse width measurement is not correct
value. Always initialize the pulse width count timer after wake-up from stop mode.
Counter value

Figure 8.7 Counter Operation during Standby Modes or Operation Halt

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CHAPTER 8 PULSE WIDTH COUNT TIMER (PWC)
FF
H
80
H
00
H
Timer cycle
UF bit
EN bit
IE bit
SLP bit
(STBC register)
Wake-up from sleep mode by IRQ5
STP bit
(STBC register)
RLBR value (FF
H
Stop request
Oscillation stabilization delay time
Interval time after wake-up from
stop mode (indeterminate)
Cleared by
the program
Sleep mode
Wake-up from stop mode by an external interrupt
Stop mode
)
Operation halts Operation halts
Operation restarts
Time
MB89620 series