¡ Semiconductor
ML9041
Serial Interface Mode
In the Serial I/F Mode, the ML9041 interfaces with the CPU via the CS, SHT, SI and SO pins.
Writing and reading operations are executed in units of 16 bits after the CS signal falls down. If
the CS signal rises up before the completion of 16–bit unit access, this access is ignored.
When the BF bit is “1”, the ML9041 cannot accept any other instructions. Before inputting a new
instruction, check that the BF bit is “0”. Any access when the BF bit is “1” is ignored.
Data format is LSB–first.
Examples of Access in the Serial I/F Mode
1) WRITE MODE
CS
1
1
2
1
3
1
4
1
5
1
6
7
8
9
10 11 12 13 14 15 16
SHT
SI
R/W RS0 RS1 D0
D1
D2
D3
D4
D5
D6
D7
SO
2) READ MODE
CS
1
2
1
3
1
4
1
5
1
6
7
8
9
10 11 12 13 14 15 16
SHT
1
R/W RS0 RS1
SI
D0
D1
D2
D3
D4
D5
D6
D7
SO
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