Fujitsu FR81S User Manual

CHAPTER 17: PPG

5. Operation

FUJITSU SEMICONDUCTOR LIMITED

CHAPTER

: PPG

FUJITSU SEMICONDUCTOR CONFIDENTIAL

5.10. PPG Communication Activation

The PPG communication activation is explained.

The PPG communication mode starts by setting the PPG communication enable (CMD), the cycle setting

(PHCDR/PLCSR), the duty setting (PHDUT/PLDUT), the data (PCMDDT), and the data bit length

(PCMDWD), and then set the activation trigger at the end. There is no restriction in the order of setting

registers other than the activation trigger.

Figure 5-10 Example of PPG Communication Mode Operation (Activation Operation Case 1)

Activation trigger

PHCSR

PLCSR

CMD

(1) cycle setting

(6) PPG communication mode enable

(7) Activation trigger

PHDUT

PLDUT

PCMDDT

PCMDWD

1h (0001)

Shift register
(PCMDDT)

(2) duty setting

(3) PPG communication mode data width

(4) PPG communication mode data

(5) transmit for shift register

02h (0000_0010)

(8) Load

Figure 5-11 Example of PPG Communication Mode Operation (Activation Operation Case 2)