ST7556 datasheet(21/43 Pages) SITRONIX

Part #	ST7556

Description	65 x 102 Dot Matrix LCD Controller/Driver

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	SITRONIX [Sitronix Technology Co., Ltd.]

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

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21 / 43 page

ST7556

Ver 2.2

21/43

2005/10/05

7. RESET CIRCUIT

Setting RESB to “L” or Reset instruction can initialize internal function.

When RESB becomes “L”, following procedure is executed

Page address: 0

Column address: 0

Oscillator: OFF

Power down mode (PD = 1)

Horizontal addressing (V = 0)

normal instruction set (H = 0)

Display OFF (D = E = 0)

Address counter X [6:0] = 0, Y [2:0] = 0

Bias system (BS [2:0] = 0)

VLCD is equal to 0; the HV generator is switched off (VOP [6:0] = 0)

After power-on, RAM data are undefined

While RESB is “L” or reset instruction is executed, no instruction except read status can be accepted. Reset status

appears at DB6. After DB6 becomes ”L”, any instruction can be accepted. RESB must be connected to the reset pin of

the MPU, and initialize the MPU and this LSI at the same time. The initialization by RESB is essential before used.

ST7556 Datasheet(PDF) 21 Page - Sitronix Technology Co., Ltd.