UPD16488AP datasheet(35/91 Pages) NEC

Part #	UPD16488AP

Description	1/92 DUTY LCD CONTROLLER/DRIVER WITH FOUR-LEVEL GRAY SCALE, ON-CHIP RAM

PDF	91 Pages

Scroll/Zoom	100%

Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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35 / 91 page

Data Sheet S15745EJ2V0DS

µµµµPD16488A

5.6.3 Use of op amp for level power supply control

Although the

µPD16488A includes a circuit designed for low power consumption (HPM1, HPM0 = 0, 0), display quality

problems may occur when a large-load LCD panel is used. In such cases, the display quality and power consumption

level can be improved by setting. The HPM1 and HPM0 flags in the power system control register 1 (R32) to "0, 1" to

"1, 1" to switch to the op amp driver capacity for mode settings shown in Table 5-14. Check the actual display quality before

deciding which mode to set.

If setting high power mode still does not sufficiently improve the display quality, the LCD drive voltage must be provided

from an external power source.

Table 5-14. Op Amp Mode Setting

HPM1

HPM0

Mode Setting

Normal mode

Low power mode

High power mode

For power ON mode

UPD16488AP Datasheet(PDF) 35 Page - NEC