3820_03 Datasheet, PDF (233/349 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.6 Serial I/O2
LSB first (when bit 5 of serial I/O2 control register is “0”) is selected
b7
b0
D0
D1 D0
D2 D1 D0
Shift clock
Fig. 2.6.5 Receive operation of serial I/O2
D7 D6 D5 D4 D3 D2 D1 D0
Serial I/O2 register
Shift clock
RxD
D0
D1
D2
D3
D4
D5
D6
D7
Fig. 2.6.6 Receive timing example of serial I/O2
2–146
3820 GROUP USER’S MANUAL