UPD16664 datasheet(5/52 Pages) NEC

5 / 52 page

Data Sheet S13780EJ1V0DS00

µµµµ PD16664

(9) Gray level control

This circuit implements the 4-gray level display.

(10) Data latch (1)

This circuit reads data for 208 pixels from RAM and latches it.

(11) Data latch (2)

This circuit latches data for 208 pixels in synchronization with the STB signal.

(12) Level shifter

The level shifter converts the operating voltage of the internal circuit(VCC2) into the voltage for the liquid crystal

driver circuit and row driver interface (VCC1).

(13) DEC

This is a decoder that decodes gray level display data to liquid crystal drive voltages V0, V1, or V2.

(14) Liquid crystal drive circuit

This circuit selects liquid crystal drive voltage V0, V1, or V2 corresponding to gray level display data and the

display OFF signal (/DOFF), to generate a liquid crystal application voltage.

(15) Self-diagnosis circuit

If the operation timing of the master chip and that of the slave chip differ due to external noise, this circuit

automatically detects the difference and generates a refresh signal to all column drivers.

UPD16664 Datasheet(PDF) 5 Page - NEC