LC75829PE Datasheet, PDF (20/22 Pages) Sanyo Semicon Device – 1/4 and 1/3-Duty General-Purpose LCD Display Driver

LC75829PE, 75829PW
Notes on Controller Transfer of Display Data
When using the LC75829 in 1/4 duty, applications transfer the display data (D1 to D208) in four operations, and in 1/3
duty, they transfer the display data (D1 to D159) in three operations. In either case, applications should transfer all of
the display data within 30 ms to maintain the quality of displayed image.
S53/OSCI Pin Peripheral Circuit
(1) Internal oscillator operating mode (control data OC=0)
Connect the S53/OSCI pin to the LCD panel when the internal oscillator operating mode is selected.
OSCI/S53
To LCD panel
(2) External clock operating mode (control data OC=1)
When the external clock operating mode is selected, insert a current protection resistor Rg (2.2 to 22kΩ) between
the S53/OSCI pin and external clock output pin (external oscillator). Determine the value of the resistance according
to the allowable current value at the external clock output pin. Also make sure that the waveform of the external
clock is not heavily distorted.
External clock output pin
External oscillator
OSCI/S53
Rg
Note: Allowable current value at external clock output pin > ^VDD
Rg
(3) Unused pin treatment
When the S53/OSCI pin is not to be used, select the internal oscillator operating mode (setting control
data OC to 0) to keep the pin open.
OSCI/S53
OPEN
No.A1462-20/22