RA8875_v15(RA8875_v15).pdf

发布时间：2023-12-02 发布人：admin 分类：养殖资料大小：0.28M 资料格式：pdf 举报版权申诉

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1. Application Circuit

2. Initial Code

3. Display on Sequence

4. Sleep Mode Sequence

5. Display RAM pure data write example

6. Appendix

RA8875 Version 1.1 Application Note Version 1.0 1.1 1.2 1.3 1.4 1.5 Date May, 03, 2011 May,09,2011 June,22,2011 July,11,2011 Nov,30,2011 June,28,2013 Update History First Release Description Schematic 2 update ,initial code update Schematic 2 update Add chapter 6.appendix All schematic update, add serial IF,serial flash program circuit. Schematic 3 update ,initial code update RAiO TECHNOLOGY INC. 2/19 www.raio.com.tw

RA8875 Version 1.1 Application Note Chapter Contents Page 1. Application Circuit................................................................................... 4 2. Initial Code................................................................................................ 7 3. Display on Sequence............................................................................. 15 4. Sleep Mode Sequence........................................................................... 16 5. Display RAM pure data write example................................................. 18 6. Appendix ................................................................................................ 19 RAiO TECHNOLOGY INC. 3/19 www.raio.com.tw

RA8875 Version 1.1 Application Note 1. Application Circuit Figure 1-1 RAiO TECHNOLOGY INC. 4/19 www.raio.com.tw

RA8875 Version 1.1 Application Note ) a i x d n e p p a e h t o t r e e r f e s a e P ※ ( l Figure 1-2 RAiO TECHNOLOGY INC. 5/19 www.raio.com.tw

RA8875 Version 1.1 Application Note Figure 1-3 RAiO TECHNOLOGY INC. 6/19 www.raio.com.tw

RA8875 Version 1.1 Application Note 2. Initial Code void RA8875_PLL_ini(void) { //Base on 20MHz crystal #ifdef P320x240 //system clock = 20*(10+1)/(2^2) = 55MHz LCD_CmdWrite(0x88); LCD_DataWrite(0x0a); Delay1ms(1); LCD_CmdWrite(0x89); LCD_DataWrite(0x02); Delay1ms(1); #endif #ifdef P480x272 //system clock = 20*(10+1)/(2^2) = 55MHz LCD_CmdWrite(0x88); LCD_DataWrite(0x0a); Delay1ms(1); LCD_CmdWrite(0x89); LCD_DataWrite(0x02); Delay1ms(1); #endif #ifdef P640x480 //system clock = 20*(11+1)/(2^2) = 60MHz LCD_CmdWrite(0x88); LCD_DataWrite(0x0b); Delay1ms(1); LCD_CmdWrite(0x89); LCD_DataWrite(0x02); Delay1ms(1); #endif #ifdef P800x480 //system clock = 20*(11+1)/(2^2) = 60MHz LCD_CmdWrite(0x88); LCD_DataWrite(0x0b); Delay1ms(1); LCD_CmdWrite(0x89); LCD_DataWrite(0x02); Delay1ms(1); RAiO TECHNOLOGY INC. 7/19 www.raio.com.tw

RA8875 Version 1.1 Application Note #endif } //------------------------------------------// void LCD_Initial(void) { RA8875_PLL_ini(); LCD_CmdWrite(0x10); //SYSR bit[4:3]=00 256 color bit[2:1]= 00 8bit MPU interface LCD_DataWrite(0x0c); // if 8bit MCU interface and 65k color display //LCD_DataWrite(0x0F); // if 16bit MCU interface and 65k color display #ifdef P320x240 //============== Display Window 320x240 ================== LCD_CmdWrite(0x04); //set PCLK invers LCD_DataWrite(0x03); //PCLK = system clock/(2^3) = 55/8 = 6.875MHz Delay1ms(1); //Horizontal set LCD_CmdWrite(0x14); //HDWR//Horizontal Display Width Setting Bit[6:0] LCD_DataWrite(0x27);//Horizontal display width(pixels) = (HDWR + 1)*8 LCD_CmdWrite(0x15); //Horizontal Non-Display Period Fine Tuning Option Register (HNDFTR) LCD_DataWrite(0x00);//Horizontal Non-Display Period Fine Tuning(HNDFT) [3:0] LCD_CmdWrite(0x16); //HNDR//Horizontal Non-Display Period Bit[4:0] LCD_DataWrite(0x05);//Horizontal Non-Display Period (pixels) = (HNDR + 1)*8 LCD_CmdWrite(0x17); //HSTR//HSYNC Start Position[4:0] LCD_DataWrite(0x04);//HSYNC Start Position(PCLK) = (HSTR + 1)*8 LCD_CmdWrite(0x18); //HPWR//HSYNC Polarity ,The period width of HSYNC. LCD_DataWrite(0x03);//HSYNC Width [4:0] HSYNC Pulse width(PCLK) = (HPWR + 1)*8 //Vertical set LCD_CmdWrite(0x19); //VDHR0 //Vertical Display Height Bit [7:0] LCD_DataWrite(0xef);//Vertical pixels = VDHR + 1 LCD_CmdWrite(0x1A); //VDHR1 //Vertical Display Height Bit [8] LCD_DataWrite(0x00);//Vertical pixels = VDHR + 1 LCD_CmdWrite(0x1B); //VNDR0 //Vertical Non-Display Period Bit [7:0] LCD_DataWrite(0x05);//Vertical Non-Display area = (VNDR + 1) LCD_CmdWrite(0x1C); //VNDR1 //Vertical Non-Display Period Bit [8] LCD_DataWrite(0x00);//Vertical Non-Display area = (VNDR + 1) LCD_CmdWrite(0x1D); //VSTR0 //VSYNC Start Position[7:0] LCD_DataWrite(0x0e);//VSYNC Start Position(PCLK) = (VSTR + 1) LCD_CmdWrite(0x1E); //VSTR1 //VSYNC Start Position[8] LCD_DataWrite(0x00);//VSYNC Start Position(PCLK) = (VSTR + 1) RAiO TECHNOLOGY INC. 8/19 www.raio.com.tw

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