BU91600FV-M Datasheet, PDF (39/67 Pages) Rohm – Low Duty LCD Segment Driver

BU91600xxx Series MAX 148 Segments (37SEG x 4COM)
Datasheet
Interrupt Based Key Data Acquisition Technique
Under the Interrupt Based Key Data Acquisition Technique, the controller uses interrupts to determine the state of the
keys (ON or OFF) and read the key data. Please refer to the flow chart diagram below.
SCCEE＝ 「L 」
SDD0O_{＝ 「}L _」
NO
YES
Key data read
processing
Wait for at
least t8
NO
SDDO0 _{＝ 「}H _」
YES
Key off
Key data read processing: Refer to “Serial Data Output”
Figure 24. Flowchart
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