Weltrend Semiconductor, Inc. WT6802 Monitor OSD with Auto-calibration Data Sheet REV. 1.0 April, 9, 2001 The information in this document is subject to change without notice. Weltrend Semiconductor, Inc. All Rights Reserved. 2F, No. 24, Indust E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan TEL:886-3-5780241 FAX:886-3-5794278.5770419 Email:[email protected] WT6802 Weltrend Semiconductor, Inc. Rev.1.0 Data Sheet DESCRIPTION WT6802 is designed to interface with a MCU to do the OSD (On Screen Display) function in CRT Monitor, besides the fancy auto-calibration function is also included. The on-chip PLL generates a wide-ranged system clock up to 60MHz to meet the resolution requirements(OSD resolution is programmable) of different display modes. The full OSD screen size is 30 columns x 15 rows, and the OSD position can be freely programmed by setting the interal registers. Special functions include color font, character bordering, shadowing, blinking, double height, double width, all blanking effect, row to row spacing control, 4 windows with shadowing, and programmable fin in/fan out effect. WT6802 has 8 channels of PWM DAC, each PWM DAC can be respectively controlled by an 8-bit register which contains a 5-bit PWM and 3-bit BRM, and the PWM clock is also programmable. The horizonal back/front porch and vertical black/front porch data can be read by MCU through the I2C bus in order to do the horizontal size/center and vertical size/center auto-calibration. FEATURES sInput horizontal synchronous frequency … … .15k-130kHZ sDot Frequency generated by On-chip PLL … ..up to 160MHz sResolution … … … programmable, up to 2040 dots/line sScreen … … … … … … … … … ..30 columns x 15 rows sCharacter … ..12(H) x 18(V) dot matrix Fonts … … … … 512 characters and 16 color fonts MCU interface I2 C bus sColor(R, G, B with intensity attribute) Character foreground 8(R, G, B) Character background 7(no blank) Window 8(R, G, B) Window shadowing 8(R, G, B) s PWM DAC 8 channels sRow to row spacing control sDouble character height and width sProgrammable character height control 18-69 lines sCharacter blinking, bordering(or shadowing) s4 programmable background windows with multi-level operation sHorizontal/vertical size and center Auto-calibration 2 2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan TEL:886-3-5780241 FAX:886-3-5794278.5770419 Email:[email protected] WT6802 Weltrend Semiconductor, Inc. Rev.1.0 Data Sheet PIN CONFIGURATION RI 1 NC 2 VSSA 3 VDDA 4 VCO 5 VDDA 6 HS 7 NC 8 SDA 9 SCL 10 WT6802 20 19 18 17 16 15 14 13 12 11 GI BI VSS R G B BLANK TEST VS VDD WT6802 (DIP-20) VSSA 1 NC 2 VCO 3 VDDA 4 HS 5 NC 6 SDA 7 SCL 8 PWM6 9 PWM4 10 PWM2 11 PWM0 12 WT6802 24 23 22 21 20 19 18 17 16 15 14 13 VSS R G B BLANK TEST VS VDD PWM7 PWM5 PWM3 PWM1 WT6802 (DIP-24, 300mil) RI 1 NC 2 VSSA 3 NC 4 VCO 5 VDDA 6 HS 7 NC 8 SDA 9 SCL 10 PWM6 11 PWM4 12 PWM2 13 PWM0 14 WT6802 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VSSA 1 NC 2 VCO 3 VDDA 4 HS 5 NC 6 SDA 7 SCL 8 GI BI VSS R G B BLANK TEST VS VDD WT6802 11 TEST 10 VS 9 VDD WT6802 (DIP-16) PWM7 PWM5 PWM3 16 VSS 15 R 14 G 13 B 12 BLANK PWM1 WT6802 (DIP-28, 300mil) 3 2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan TEL:886-3-5780241 FAX:886-3-5794278.5770419 Email:[email protected] WT6802 Weltrend Semiconductor, Inc. Rev.1.0 Data Sheet PIN DESCRIPTION PIN No Symbol Pin Name Input/ Description output 28 24 20 16 pin pin pin pin 1 -- 1 -- RI 2 -- 2 -- NC 3 1 3 1 4 2 4 2 5 3 5 3 6 4 6 7 5 7 8 6 8 9 7 9 10 8 10 11~18 9~16 -- Red Input input VSSA Analog ground No NC connectio n __ VCO __ VCO Video Red input from Pre-AMP __ Connected to external loop filter circuit Analog __ +5 V power Horizonta 5 HS l Input Horizontal synchronous input signal SYNC No 6 NC connectio __ n Serial Input/out 2 7 SDA I C data data put Serial 8 SCL input I2 C clock clock 8 channels of 8-bit PWM DAC. Refer to pin PWM0~ PWM assignment in -output PWM7 DACs page1 for each PWM DAC’s pin assignment. Digital 9 VDD __ +5 V power Vertical 10 VS input Vertical synchronous input signal SYNC 4 VDDA TEST 19 17 11 20 18 12 21 19 13 11 22 20 14 12 TEST BLANK Blank output Output test only output Blank signal output 5 2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan TEL:886-3-5780241 FAX:886-3-5794278.5770419 Email:[email protected] WT6802 Weltrend Semiconductor, Inc. Rev.1.0 Data Sheet 23 21 15 13 B 24 22 16 14 G 25 23 17 15 R 26 24 18 16 VSS 27 -- 19 -- BI 28 -- 20 -- GI Blue output Green output Red output Digital Ground Blue input Green input output Blue signal output output Green signal output output Red signal output input Video Blue input from Pre-AMP input Video Green input from Pre-AMP 6 2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan TEL:886-3-5780241 FAX:886-3-5794278.5770419 Email:[email protected]