ST7575 datasheet(30/51 Pages) SITRONIX

Part #	ST7575

Description	66 x 102 Dot Matrix LCD Controller/Driver

PDF	51 Pages

Scroll/Zoom	100%

Manufacturer	SITRONIX [Sitronix Technology Co., Ltd.]

Direct Link	http://www.sitronix.com.tw

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30 / 51 page

ST7575

Ver 1.3

30/51

2007/09/12

Set V0

R/W(RWR)

VOP6

VOP5

VOP4

VOP3

VOP2

VOP1

VOP0

The operation voltage V0 can be set by software.

V0=( a + VOPx X b )

(1)

The parameters are explained in table 4. The maximum voltage that can be generated is depending on the VDD2 voltage

and the display load current. For the V0 programmable range, V0 starts from a (6.78V, VOP[6:0]=0x01) with each step equal

to b (0.03V). Note that the internal booster is turned off if VOP[6:0]=0x00. Please don’t operate this IC with this setting

(VOP[6:0]=0).

* The Vop must be operated in the range of 8V to 9.5V for the normal or partial display mode application, so that

customer have some range(<8V; >9.5V) to adjust contrast by themselves.

Table 4 Typical values for parameter for the HV-Generator programming

SYMBOL

VALUE

UNIT

6.75

0.03

VOP[6:0] (programmed) {00 hex… 7F hex}

Fig 14. Setting V0 Voltage

ST7575 Datasheet(PDF) 30 Page - Sitronix Technology Co., Ltd.