Fujitsu 8FX Hardware Manual page 330

CHAPTER 18 8/16-BIT PPG
18.2 Configuration
● Counter clock selector
The clock for the countdown of 8-bit downcounter is selected from eight types of internal
count clocks.
● 8-bit downcounter
It counts down with the count clock selected with the count clock selector.
● Comparator circuit
The output is kept "H" level until the value of 8-bit downcounter is corresponding to the value
of 8/16-bit PPG duty setup buffer register from the value of 8/16-bit set buffer register of PPG
cycle.
Afterwards, after keep "L" level the output until the counter value is corresponding to "1", it
keeps counting 8-bit downcounter from the value of 8/16-bit PPG cycle setup buffer register.
● 8/16-bit PPG timer n1 control register (PCn1)
The operation condition on the PPG timer n1 side of 8/16-bit PPG timer is set.
● 8/16-bit PPG timer n0 control register (PCn0)
The operation mode of 8/16-bit PPG timer and the operation condition on the PPG timer n0
side are set.
● 8/16-bit PPG timer n1/n0 cycle setup buffer register (PPSn1/PPSn0)
The compare value for the cycle of 8/16-bit PPG timer is set.
● 8/16-bit PPG timer n1/n0 duty setup buffer register (PDSn1/PDSn0)
The compare value for "H" width of 8/16-bit PPG timer is set.
● 8/16-bit PPG start register
The start or the stop of 8/16-bit PPG timer is set.
● 8/16-bit PPG output inversion register
An initial level also includes the output of 8/16-bit PPG timer and it is reversed.
■ Input Clock
The 8/16-bit PPG uses the output clock from the prescaler as its input clock (count clock).
308 FUJITSU SEMICONDUCTOR LIMITED
MB95630H Series
MN702-00009-2v0-E