LC75835W Datasheet, PDF (19/35 Pages) Sanyo Semicon Device – CMOS IC 1/3, 1/4-Duty General-Purpose LCD Display Driver

LC75835W
5. DR: 1/3 bias drive or 1/2 bias drive switching control data
This control data bit selects either 1/3 bias drive or 1/2 bias drive.
DR
Bias drive scheme
0
1/3 bias drive
1
1/2 bias drive
6. DT: 1/4 duty drive or 1/3 duty drive switching control data
This control data bit selects either 1/4 duty drive or 1/3 duty drive.
DT
Duty drive scheme
Output pin (COM4/S35) status
0
1/4 duty drive
COM4 (common output)
1
1/3 duty drive
S35 (segment output)
7. OC: Internal oscillator operating mode/external clock operating mode switching control data
This control data bit selects either internal oscillator operating mode or external clock operating mode.
OC
Basic clock operation mode
Input pin (OSCI) status
0
Internal oscillator operating mode
Must be connected to GND.
1
External clock operating mode
The clock signal (15 to 65 [kHz]) must be input from an external source.
8. FC0, FC1: Common/segment output waveform frame frequency setting control data
These control data bits set the frame frequency for common and segment output waveforms.
Control data
Frame frequency fo [Hz]
FC0
FC1
1/4 duty drive
1/3 duty drive
0
0
fosc/5760, fCK/640
fosc/5670, fCK/630
1
0
fosc/4608, fCK/512
fosc/4536, fCK/504
0
1
fosc/3456, fCK/384
fosc/3402, fCK/378
1
1
fosc/2304, fCK/256
fosc/2268, fCK/252
Note: fosc: Internal oscillation frequency (295 [kHz] typ.), fCK: External clock operating frequency
(32.8 [kHz] typ.)
9. BF0, BF1: Segment blinking frequency setting control data
Theses control data bits control the segment blinking frequency.
Control data
BF0
BF1
Segment blinking frequency fb [Hz]
0
0
fosc/184320, fCK/20480
1
0
fosc/147456, fCK/16384
0
1
fosc/110592, fCK/12288
1
1
fosc/73728, fCK/8192
Note: fosc: Internal oscillation frequency (295 [kHz] typ.), fCK: External clock operating frequency
(32.8 [kHz] typ.)
10. 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.
11. BC: LCD drive bias voltage generation divider resistor current on/off control data
This control data is used to turn on/off the current to the LCD drive bias voltage generation divider resistors.
BC
LCD drive bias voltage generation divider resister state
0
Turns on current to the divider resistors.
1
Turns off current to the divider resistors.
No.A0429-19/35