ST7577 datasheet(22/48 Pages) SITRONIX

Part #	ST7577

Description	132 x 39 Dot Matrix LCD Controller/Driver

PDF	48 Pages

Scroll/Zoom	100%

Manufacturer	SITRONIX [Sitronix Technology Co., Ltd.]

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

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22 / 48 page

ST7577

Ver 1.0a

22/48

2008/02/14

8. RESET CIRCUIT

Setting RESB to

“L” can initialize internal function. While RESB is “L”, no instruction except read status can be accepted.

The initialization by RESB is essential before using.

When RESB becomes

“L”, the following procedures will start.

Fix COM/SEG outputs at VSS.

Page address: Y[2:0]=0

Column address: X[7:0]=0

COM Scan Direction MY=0

SEG Select Direction XD=1

Data Format: MLB=MLB pin setting

Power down mode: PD=1

Initial V0 setting: VOP[6:0]=0

Display control: Display Blank: D=E=0

Normal instruction set: H=0

Frame Rate = 73Hz. FR[2:0]=011b

Duty selection: Depends on DTY pin setting.

Booster setting: BE=0, PC[1:0]=01b (Booster Efficiency Level 2, Booster X3)

Bias system: BS[1:0]=[0,0] (1/7 Bias)

After power-on, RAM data are undefined and the Display status is

“Blank”. It’s better to initialize whole DDRAM (fill all 00h

or write the display pattern) before turning the Display ON.

ST7577 Datasheet(PDF) 22 Page - Sitronix Technology Co., Ltd.