ST7578
7. RESET CIRCUIT
Setting RESB to “L” or RESET instruction can initialize internal function. While RESB is “L”, no instruction except read
status can be accepted. RESB pin must connect to the reset pin of MPU and initialization by RESB pin is essential before
operating.
When RESB becomes “L”, the following procedures will start.
Power Down Mode: PD=1 (Analog Power OFF, Oscillator OFF & COM/SEG output at VSS)
Page Address: Y[3:0]=0
Column Address: X[6:0]=0
COM Scan Direction: MY=0
SEG Select Direction: MX=0
Data Orientation: DO=0
Display Control: Display OFF: D=E=0
Basic Instruction Set: H=0
Booster setting: Depends on “CP” setting
Initial V0 Setting: VOP[6:0]=0; PRS=0 (Regulator OFF)
Bias system: BS[2:0] Depends on “BR” setting
After power-on, RAM data are undefined and the display status is “Display OFF”. It’s better to initialize whole DDRAM (ex:
fill all 00h or write the display pattern) before turning the Display ON.
Ver 1.2
26/52
2007/04/30
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
