BU97540KV-M Datasheet, PDF (39/70 Pages) Rohm – Multi-function Segment Drivers

BU97540KV-M
Serial Data Output
1.When SCL is stopped at the low level^(Note24)
SCE
SCL
SDI
SDO
1 1 0 0 0 010
B0
B1
B2
B3
A0
A1
A2
A3
X KD1 KD2
KD27 KD28 KD29 KD30 SA
Output Data
(Note24)
1. X=Don’t care
2. B0 to B3, A0 to A3: Serial Interface address
Figure 15. Serial Data Output Format
2. When SCL is stopped at the high level^(Note25)
SCE
SCL
SDI
SDO
11
0
0
0
01
B0
B1
B2
B3
A0
A1
A2
0
A3
KD1 KD2 KD3
KD28 KD29 KD30 SA X
Output Data
Figure 16. Serial Data Output Format
(Note25)
1. X=Don’t care
2. B0 to B3, A0 to A3: Serial Interface address
3. Serial Interface address: 43H
4. KD1 to KD30: Key data
5. SA: Sleep acknowledge data
6. If a key data read operation is executed when SDO is high, the read key data (KD1 to KD30) and sleep acknowledge data (SA) will be invalid.
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29.Jun.2015 Rev.002