E202075_HD404889 Datasheet, PDF (114/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
SI/SO
SCK
Idle control
logic
I/O control
logic
Octal counter
(OC)
Serial interrupt
request flag
(IFS)
Clock
Serial data
register
(SRL/U)
System
clock
ø_PER
Transfer
control
1/2
2
÷2
1/2
÷8
÷32
÷128
÷512
÷2048
4
Serial mode
register 1
(SMR1)
Data bus
Clock line
Signal line
Serial mode
register 2
(SMR2)
Figure 62 Serial Interface Block Diagram
112