BU91600FV-M Datasheet, PDF (25/67 Pages) Rohm – Low Duty LCD Segment Driver

BU91600xxx Series MAX 148 Segments (37SEG x 4COM)
Datasheet
7. OC: Internal oscillator operating mode/External clock operating mode switching control data in OSCIN/S37
These control data bits select either Internal oscillator operating or External clock operating mode.
OC
Operating mode
In/Out pin(OSCIN/S37) status
Reset
condition
0
Internal oscillator
S37 (segment output)
○
1
External Clock
OSCIN (clock input)
OC=1： OSCIN/S37 pin can be used as input clock pin when External Clock is set by the control data.
8. SC: Segment on/off switching control data
This control data bit controls the on/off state of the segments.
SC
Display state
Reset
condition
0
On
1
Off
○
Note that when the segments are turned off by setting SC to “1”, the segments are turned off by outputting segment
off waveforms from the segment output pins.
9. BU0,BU1 and BU2: Normal mode/power-saving mode switching control data
These control data bits select either normal mode or power-saving mode.
BU0
BU1
BU2
Mode
OSC Oscillator
Segment outputs
Common outputs
Output Pin States During Key Scan Standby
KS1 KS2 KS3 KS4 KS5
0
0
0 Normal
Operating
Operating
H
H
H
H
H
0
0
1
L
L
L
L
H
0
1
0
L
L
L
H
H
0
1
1
1
0
0
Power-
saving
Stopped
1
0
1
Low(VSS)
L
L
H
H
H
L
H
H
H
H
H
H
H
H
H
1
1
0
H
H
H
H
H
1
1
1
H
H
H
H
H
Power-saving mode status: S5/P1/G1 to S20/P16/G16 = active only General Purpose output
S1 to S4, S21 to S22, S28 to S31 = low (VSS)
KS1/S23 to KS5/S27 = low (VSS)
KI1/S32 to KS4/S35 = low (VSS)
PWMIN/S36 = low (VSS)
OSCIN/S37 = low (VSS)
COM1 to COM4 = low (VSS)
Stop the LCD drive bias voltage generation circuit
Stop the Internal oscillation circuit
However, serial data transfer is possible when at Power-saving mode.
Reset
condition
○
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TSZ22111・15・001
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TSZ02201-0P4P0D301300-1-2
16.Feb.2016 Rev.001