E202075_HD404889 Datasheet, PDF (125/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Serial data register (lower) (SRL: $026)
Bit
3
2
1
0
Read/Write
R/W
R/W
R/W
R/W
Initial value on reset Undetermined Undetermined Undetermined Undetermined
Bit name
SR3
SR2
SR1
SR0
Figure 68 Serial Data Register (SRL)
Serial data register (upper) (SRU: $027)
Bit
3
2
1
0
Read/Write
R/W
R/W
R/W
R/W
Initial value on reset Undetermined Undetermined Undetermined Undetermined
Bit name
SR7
SR6
SR5
SR4
Figure 69 Serial Data Register (SRU)
Serial
clock
Serial output
data
Serial input
data latch
timing
1
2
3
4
5
6
7
8
LSB
MSB
Figure 70 Serial Interface Input/Output Timing Chart
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