HD404639R Datasheet, PDF (56/135 Pages) Renesas Technology Corp – 4-Bit Single-Chip Microcomputer

HD404639R Series
Serial mode register 2A (SM2A: $01B)
Bit
Initial value
Read/Write
Bit name
3
0
W
SM2A3
2
0
W
SM2A2
1
0
W
SM2A1
0
0
W
SM2A0
R5₁/SCK₂
SM2A3 mode selection
0
R5₁
1
SCK₂
SM2A2
0
SM2A1 SM2A0 SCK₂ Clock source
0
0 Output Prescaler
Prescaler
division
ratio
÷2048
1 Output Prescaler
÷512
1
0 Output Prescaler
÷128
1 Output Prescaler
÷32
1
0
0 Output Prescaler
÷8
1 Output Prescaler
÷2
1
0 Output System clock —
1 Input External clock —
Figure 35 Serial Mode Register 2A (SM2A)
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