Fujitsu FR81S Benutzerhandbuch
CHAPTER 17: PPG
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : PPG
FUJITSU SEMICONDUCTOR CONFIDENTIAL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
60
5.12. PPG Communication Forced Stop and Restart
operation
The PPG communication forced stop and restart operation is explained.
The PPG communication stops and the internal circuit other than the setting register are initialized when "0"
is written in the PPG communication mode setting register (CMD) during the PPG communication mode
operation. Moreover, to restart the PPG communication operation, it is necessary to write the setting in all
related registers.
is written in the PPG communication mode setting register (CMD) during the PPG communication mode
operation. Moreover, to restart the PPG communication operation, it is necessary to write the setting in all
related registers.
Figure 5-14 Example of PPG Communication Mode Operation (Communication Forced Stop
and Restart)
and Restart)
Activation trigger
PHCSR
A
PLCSR
B
Down count value
(PTMR)
(PTMR)
A
D
C
PPG pin output
Normal polarity
Inverted polarity
CMD
(1) cycle setting
(5) PPG communication mode enable
(7) Activation trigger
(8) Load
PHDUT
C
PLDUT
D
PCMDDT
B
(9) down count
(10) match
(11) inversion
(13) borrow
(14) clear
(15) Load
(16)
(18)
PCMDWD
5h (0101)
PPG output counter
5
4
1
0
1F
1F
Shift register
(PCMDDT)
(PCMDDT)
Register Empty flag
(REMP)
(REMP)
Shift register Empty flag
(SREMP)
(SREMP)
(2) duty setting
(3) PPG communication mode data width
(4) PPG communication mode data
(6) transmit for shift register
B4h (1011_0100)
B4h (1011_0100)
A
B
C
D
1h (0001)
03h (0000_0011)
03h (0000_0011)
1F
(17) PPG communication mode disable
(20)
(12) down count
00h (0000_0000)
※1
High format cycle
※2
Low format cycle
※1 : High format duty
※2 : Low format duty
※2 : Low format duty
※1
※1
High format cycle
High format cycle
MB91520 Series
MN705-00010-1v0-E
601