ST7573

Ver 1.0b

21/46

2007/07/12

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.

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

Display control: Display Blank: D=E=0

Normal instruction set: H=0

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

Display Duty = 33 Duty

Display Part = COM0

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.