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ST7789V2 Datasheet(PDF) 220 Page - Sitronix Technology Co., Ltd. |
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ST7789V2 Datasheet(HTML) 220 Page - Sitronix Technology Co., Ltd. |
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220 / 319 page  ST7789V2 Version 1.0 Page 220 of 319 2016/11 Sitronix Confidential The information contained herein is the exclusive property of Sitronix and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of Sitronix. 9.1.29 VSCSAD (37h): Vertical Scroll Start Address of RAM 37H VSCSAD (Vertical Scroll Start Address of RAM) Inst / Para D/CX WRX RDX D17-8 D7 D6 D5 D4 D3 D2 D1 D0 HEX VSCSAD 0 ↑ 1 - 0 0 1 1 0 1 1 1 (37h) 1ST parameter 1 ↑ 1 - VSP15 VSP14 VSP13 VSP12 VSP11 VSP10 VSP9 VSP8 2ND parameter 1 ↑ 1 - VSP7 VSP6 VSP5 VSP4 VSP3 VSP2 VSP1 VSP0 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: When ML=0 Example: When Top Fixed Area = Bottom Fixed Area = 00, vertical Scrolling Area = 320 and VSP = ‘3’ When ML=1 Example: When Top Fixed Area = Bottom Fixed Area = 00, vertical Scrolling Area = 320 and VSP = ‘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. VSP refers to the Frame Memory line Pointer Restriction Since the value of the vertical scrolling start address is absolute (with reference to the frame memory), it must not enter the fixed area (defined by Vertical Scrolling Definition (33h)- otherwise undesirable image will be displayed on the panel) Register |
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