LC75843UGA Datasheet, PDF (19/35 Pages) ON Semiconductor – Duty General-Purpose LCD Driver

LC75843UGA
(5) FC0 to FC3    Common/segment output waveform frame frequency control data
These control data bits set the frame frequency of the common and segment output waveforms.
Control data
Frame frequency fo[Hz]
FC0 FC1 FC2 FC3
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
Internal oscillator
operating mode
(The control data OC is 0,
fosc=300[kHz]typ)
fosc/6144
fosc/5376
fosc/4608
fosc/3840
fosc/3456
fosc/3072
fosc/2688
fosc/2304
fosc/2112
fosc/1920
fosc/1728
fosc/1536
fosc/1344
fosc/1152
fosc/960
fosc/768
External clock
operating mode
(The control data OC is 1,
and EXF is 0,
fCK1=300[kHz]typ)
fCK1/6144
fCK1/5376
fCK1/4608
fCK1/3840
fCK1/3456
fCK1/3072
fCK1/2688
fCK1/2304
fCK1/2112
fCK1/1920
fCK1/1728
fCK1/1536
fCK1/1344
fCK1/1152
fCK1/960
fCK1/768
External clock
operating mode
(The control data OC is 1,
and EXF is 1,
fCK2=38[kHz]typ)
fCK2/768
fCK2/672
fCK2/576
fCK2/480
fCK2/432
fCK2/384
fCK2/336
fCK2/288
fCK2/264
fCK2/240
fCK2/216
fCK2/192
fCK2/168
fCK2/144
fCK2/120
fCK2/96
(6) DN    S28 pin state setting control data
This control data bit sets state of the S28 pin.
DN
1/4 duty
Number of display segments
1/3 duty
1/2 duty
0
Up to 96 segments
Up to 75 segments
Up to 52 segments
1
Up to100 segments
Up to 78 segments
Up to 54 segments
1/1 duty
Up to 27 segments
Up to 28 segments
Pin state
S28
“L” (VSS)
S28
(7) EXF    External clock operating frequency setting control data
This control data sets the operating frequency of the external clock which input into the OSCI pin, when the external
clock operating mode (OC=“1”) is set. However, this control data is effective only when external clock operating
mode (OC=“1”) is set.
EXF
External clock operating frequency fCK[KHz]
0
fCK1=300[kHz]typ
1
fCK2=38[kHz]typ
(8) OC    Internal oscillator operating mode/external clock operating mode switching control data.
This control data bit selects either the internal oscillator operating mode or external clock operating mode.
OC
Fundamental clock operating mode
Input pin (OSCI) state
0
Internal oscillator operating mode
Connect to GND
1
External clock operating mode
Input the clock from the outside
(9) SC    Segment on/off control data
This control data bit controls the on/off state of the segments.
SC
Display state
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.
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