ST7637 datasheet(122/210 Pages) SITRONIX

122 / 210 page

ST7637

Ver 1.6

122/210

2009/03

9.1.32. VSCSAD: Vertical Scroll Start Address of RAM (37h)

Command

/RD

/WR

Hex

VSCSAD

(37h)

Parameter

SSA7 SSA6 SSA5 SSA4 SSA3 SSA2 SSA1 SSA0

Description

This command is used together with Vertical Scrolling Definition (33h). These two commands

describe the scrolling area and the scrolling mode.

The Vertical Scrolling Start Address command has one parameter which describes which line in

the Frame Memory will be written as the first line after the last line of the Top Fixed Area on the

display as illustrated below:

This command Start the scrolling.

Exit from V-scrolling mode by commands Partial mode On (12h) or Normal mode On (13h).

When MADCTR ML=0

Example:

When Top Fixed Area=Bottom Fixed Area=00, Vertical Scrolling Area=132 and Vertical Scrolling

Pointer SSA=’3’.

Memory

SSA [7:0]

Scroll start address

(0,0)

(0,131)

131

130

Display

COM0

COM1

COM2

COM129

COM131

COM130

Scan address

When MADCTR ML=1

Example:

When Top Fixed Area=Bottom Fixed Area=00, Vertical Scrolling Area=132 and Vertical Scrolling

Pointer SSA=’3’.

NOTE: When new Pointer position and Picture Data are sent, the result on the display will

happen at the next Panel Scan to avoid tearing effect.

SSA refers to the Frame Memory line Pointer.

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