Fujitsu FR81S User Manual
CHAPTER 17: PPG
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : PPG
FUJITSU SEMICONDUCTOR CONFIDENTIAL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
49
5.6. GATE Operation
The GATE operation is explained.
PPG can be activated/stopped by GATE signals from the waveform generator. PPG activation valid time
can be controlled by the EDGE bit of the GATE control register (GATEC:EDGE) and GATE signals from
the waveform generator.
can be controlled by the EDGE bit of the GATE control register (GATEC:EDGE) and GATE signals from
the waveform generator.
Figure 5-7 PPG Count Operation by GATE Function
GATE signal
PPG
Down counter
Down counter
PPG output
（OSEL=0）
（OSEL=0）
EDGE=0(rising activation → falling stop)
GATE signal
PPG
downcounter
downcounter
PPG output
（OSEL=0）
（OSEL=0）
EDGE=1(falling activation → rising stop)
Start
Stop
Start
Start
Stop
Start
PCN:MDSE=0(PWM operation)
PCN:MDSE=0(PWM operation)
If the one-shot pulse operation (PCN:MDSE= "1") is set when PPG operation is selected (GATEC:STGR)
by GATE function, continuous pulses are output from the PPG output pin in the same way as the PWM
operation.
by GATE function, continuous pulses are output from the PPG output pin in the same way as the PWM
operation.
GATE signals from
the waveform
generator
GATE signals from
the waveform
generator
MB91520 Series
MN705-00010-1v0-E
590