HD404654 Datasheet, PDF (67/109 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

Table 25 Serial Transmit Clock (prescaler output)
SM1B
Bit 0
0
SM1A
Bit 2
0
Bit 1
0
1
1
0
1
0
0
1
1
0
Bit 0
0
1
0
1
0
1
0
1
0
1
0
1
Prescaler Division Ratio
÷ 2048
÷ 512
÷ 128
÷ 32
÷8
÷2
÷ 4096
÷ 1024
÷ 256
÷ 64
÷ 16
÷4
HD404654 Series
Transmit Clock Frequency
4096t_cyc
1024t_cyc
256t_cyc
64t_cyc
16t_cyc
4t _cyc
8192t_cyc
2048t_cyc
512t_cyc
128t_cyc
32t_cyc
8_tcyc
Operating States: Serial interface 1 has the following operating states; transitions between them are
shown in figure 53.
 STS wait state
 Transmit clock wait state
 Transfer state
 Continuous transmit clock output state (only in internal clock mode)
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