UPD16448A Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD16448A

SOURCE DRIVER FOR 240-OUTPUT TFT-LCD (NAVIGATION, AUTOMOBILE LCD-TV)

NEC => Renesas Technology 

µPD16448A

5 2.3 Write Operation Timing

The sampled video signals are written to the LCD panel by output currents IVOL and IVOH via output buffer. The

dynamic range is 4.3 VMIN. (VDD2 = 5.0 V).

While INH = H, do not stop shift clocks CLI1 through CLI3.

The output operation of this IC is controlled by INH signals.

INH = Hiz

INH = Connected with internal circuit

(switch sample and hold circuit at the falling edge.)

Therefore, performing Vcom inversion while INH = L causes current flow to these IC output pins, which may result

in malfunction. Perform Vcom in version during INH = H (Hi-z) and start output operation of the next line after the

Vcom signal is stable enough to operate. Make sure to evaluate this output operation sufficiently.

INH

Output voltage

1 horizontal period

1 horizontal period

Vcom

15

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