BU91600FV-M Datasheet, PDF (27/67 Pages) Rohm – Low Duty LCD Segment Driver

BU91600xxx Series MAX 148 Segments (37SEG x 4COM)
Datasheet
11. PF0, PF1, PF2, and PF3: PWM output waveform frame frequency switching control data
These control data bits set the frame frequency for PWM output waveforms of Px/Gx pins. (x=1 to 6).
PF0
PF1
PF2
PF3
PWM output Frame
Frequency fp(Hz)
0
0
0
0
fosc / 4096
0
0
0
1
fosc / 3840
0
0
1
0
fosc / 3584
0
0
1
1
fosc / 3328
0
1
0
0
fosc / 3072
0
1
0
1
fosc / 2816
0
1
1
0
fosc / 2560
0
1
1
1
fosc / 2304
1
0
0
0
fosc / 2048
1
0
0
1
fosc / 1792
1
0
1
0
fosc / 1536
1
0
1
1
fosc / 1280
1
1
0
0
fosc / 1024
1
1
0
1
fosc / 768
1
1
1
0
fosc / 512
1
1
1
1
fosc / 256
The following can output PWM output waveforms when selected.
P0 to P4：PWM / General Purpose output is selected.
PG1 to PG6：PWM output is selected.
EP1 to EP6：Internal PWM is selected.
Reset
condition
○
12. CT0, CT1, CT2 and CT3: LCD display contrast switching control data
These control data bits set display contrast
CT0
CT1
CT2
CT3
LCD Drive bias voltage
for VLCD Level
0
0
0
0
1.000*VDD
0
0
0
1
0.975*VDD
0
0
1
0
0.950*VDD
0
0
1
1
0.925*VDD
0
1
0
0
0.900*VDD
0
1
0
1
0.875*VDD
0
1
1
0
0.850*VDD
0
1
1
1
0.825*VDD
1
0
0
0
0.800*VDD
1
0
0
1
0.775*VDD
1
0
1
0
0.750*VDD
1
0
1
1
0.725*VDD
1
1
0
0
0.700*VDD
1
1
0
1
0.675*VDD
1
1
1
0
0.650*VDD
1
1
1
1
0.625*VDD
These control data bits set VLCD voltage level (the max level voltage of LCD driving voltage).
Reset
condition
○
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TSZ22111・15・001
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TSZ02201-0P4P0D301300-1-2
16.Feb.2016 Rev.001