VX1937

VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.1/P.14 DESCRIPTION VXIS VX1937 TV encoder is a stand-alone integrated circuit that converts to 525-line (M) NTSC or 625-line (B, D, G, H, I, M, N, Nc) PAL composite video and S-video outputs. VX1930 integrates a digital NTSC / PAL encoder with 8-bits YCbCr and 10-bits DAC interfaces. A high level of integration and performance makes the chip ideal for a variety of stand-alone and system-level integration solutions. APPLICATION n Set-top box n Computer compatible TV n DVD movie playback PACKAGE n 128-pin PQFP FUNCTIONAL BLOCK DIAGRAM VXIS Technology Corp., reserves the right to change or modify the information contained herein without notice. Contact VXIS or visit the website to ensure the most recent revision of the document. VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.2/P.14 FEATURES n Four 10-bits DAC for CVBS2 / G / Y, Y / R / V, C / B / U and CVBS1. Transfer rate up to 27 MHz. n Internal generate COLOR BAR test patterns. n Only one Crystal (27 MHz) required. n Adjustable sharpness, brightness, contrast, saturation and hue. n Simultaneous composite / S- video output. n Selectable TV output format, composite, S-video, YUV or RGB for SCART. n Build in OSD. n CMOS technology in 128-pin PQFP. n 3.3V supply. PIN DESCRIPTION (There are no internal pull-up/pull-down for input/bi-direct pins) VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.3/P.14 Pin no. Name Pin no. Name Pin no. Name Pin no. Name 1 VGACLKIN 33 CSB 65 DVDD 97 DVSS 2 EXTVGASEL 34 RASB 66 CVBS1 98 NC 3 VGACLKDIV 35 CASB 67 AVSSDAC 99 DVDD 4 DVSS 36 WEB 68 CVBS2/G/Y 100 AVDDADC 5 DVSS 37 D7 69 AVDDDAC 101 B 6 A11 38 D6 70 RSET 102 AVSSADC 7 A10 39 D5 71 C/B/U 103 AVSSADC 8 A9 40 D4 72 AVDDDAC 104 AVSSVGA 9 A8 41 D3 73 Y/R/V 105 NC 10 A7 42 D2 74 AVSSDAC 106 VRB3 11 A6 43 D1 75 DVSS 107 AVDDVGA 12 A5 44 D0 76 DVDD 108 AVDDADC 13 A4 45 DVSS 77 CSYNC 109 G 14 A3 46 DQM 78 TV_VS 110 AVSSADC 15 A2 47 DVDD 79 TV_HS 111 NC 16 A1 48 D15 80 DVSS 112 AVDDADC 17 A0 49 D14 81 PWRDN 113 R 18 DVDD 50 D13 82 OSDEN 114 AVSSADC 19 DVDD 51 D12 83 ZOOM 115 VTOP0 20 DVDD 52 D11 84 MENU 116 VRB4 21 AVDDPLL2 53 D10 85 DVDD 117 UP_CLKIN 22 AVSSPLL2 54 D9 86 SIZE 118 DN_FBIN 23 DVSS 55 D8 87 LEFT 119 DVSS 24 DVSS 56 FREEZE 88 RIGHT 120 PAD120 25 XTALO 57 DVSS 89 UP 121 AVSSPLL1 26 XTALI 58 DVDD 90 DOWN 122 MIOUT 27 DVDD 59 SCL 91 RGB 123 MICPN 28 DETECT_EN 60 SDA 92 YUV 124 NC 29 DVSS 61 SHARPIN 93 XRESET 125 MVCTR 30 RAM_CLK 62 TVSTD2 94 DVSS 126 NC 31 DVDD 63 TVSTD1 95 VS 127 AVDDPLL1 32 DVSS 64 TVSTD0 96 HS 128 DVDD VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.4/P.14 Pin Name Pin Number Type Function Description A/D Converter Interface R 113 Analog 0.5v to 1.4v Analog Red input. AC coupled red input signal. Normally input voltage range is 0.7v to 1v Vpp(peak to peak). This input is clamped to VRB during Hsync. G 109 Analog 0.5v to 1.4v Analog Green input. AC coupled green input signal. Normally input voltage range is 0.7v to 1v Vpp(peak to peak). This input is clamped to VRB during Hsync. B 101 Analog 0.5v to 1.4v Analog Blue input. AC coupled blue input signal. Normally input voltage range is 0.7v to 1v Vpp(peak to peak). This input is clamped to VRB during Hsync. Clock XTALI 26 IN 27 MHz crystal input. XTALO 25 OUT 27 MHz crystal output. EXTVGASEL 2 IN Select external clock for ADC. EXTVGASEL=1: ADC clock from external. EXTVGASEL=0: ADC clock internally. Should be connected to POWER or GND. VGACLKDIV 3 OUT Internal divider output for external gen-lock PLL. VGACLKIN 1 IN External ADC clock input or gen-lock PLL clock. Should be connected to GND when using internal PLL. DETECT_EN 28 IN Enable PLL jitter detect function. Should be connected to GND when disable PLL jitter detection. Global Control Pins HS 96 IN VGA Horizontal Sync. VS 95 IN VGA Vertical Sync. XRESET 93 IN Reset internal state machine and initializes default register values. Active High. VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.5/P.14 Pin Name Pin Number Type Function Description Video Output CVBS2/G/Y 68 Analog Output Video output 2, can be composite, green or luminace output controlled by register. Y/R/V 73 Analog Output Video output, can be luminace, red or V component of YUV. C/B/U 71 Analog Output Video output, can be chrominace, blue or U component of YUV. CVBS1 66 Analog Composite video output 1. CSYNC 77 OUT Composite sync output. TV_HS 79 OUT Horizontal sync. out to TV. TV_VS 78 OUT Vertical sync. out to TV. DA Converter Interface RSET (1) 70 Analog External resistor for DAC current reference. Frame Memory Interface D[15:0] 48-55, 37-44 IO Frame memory data bus for 16MB SDRAM interface. A[11:0] 6-17 OUT Frame memory address bus. CSB 33 OUT Frame memory CS\ control signal. RASB 34 OUT Frame memory RAS\ control signal. CASB 35 OUT Frame memory CAS\ control signal. WEB 36 OUT Frame memory WE\ control signal. DQM 46 OUT Frame memory DQM control signal. RAM_CLK 30 OUT Frame memory clock control signal. Secondary Video Interface PWRDN 81 IN Power down pin (level sensitive). OSDEN 82 IN OSD enable. Disable Zoom, Size, Left, Right, Up, down On Screen Display when 0 (level sensitive). ZOOM 83 IN ZOOM and UN-ZOOM (falling edge trigger and pull-up externally). MENU 84 IN Show OSD menu (falling edge trigger and pull-up externally). OSD display sequential: HSIZE à VSIZE à Brightness à Contrast à Hue à Saturation à Flick à Sharpness à Osd_background LEFT 87 IN Left position control (falling edge trigger and pull-up externally). VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.6/P.14 Pin Name Pin Number Type Function Description Secondary Video Interface RIGHT 88 IN Right position control (falling edge trigger and pull- up externally). UP 89 IN Up position control or increment function (falling edge trigger and pull-up externally). DOWN 90 IN Down position or decrement function (falling edge trigger and pull-up externally). SIZE 86 IN Underscan / Overscan toggle (falling edge trigger and pull-up externally). RGB YUV 91,92 I (level sensitive). X0 :RGB output 01 :YUV output 11 :Composite/Y/C output uP Serial Bus Interface SCL 59 I IIC bus clocking. SDA 60 IO IIC bus address/data bus. ADDR_SEL_ FREEZE 56 I Slave address selection. ADDR_SEL=1: 0x6A for write, 0x6B for read. ADDR_SEL=0: 0x4A for write, 0x4B for read. Freeze when hardware mode (falling edge trigger and pull-up externally). Hardware mode interface TVSTD2, TVSTD1, TVSTD0 62,63,64 I TV standard control (level sensitive). 000:NTSC-M 001:NTSC-EIAJ 010:PAL-M 011:PAL-N 100:PAL-BDGHI OTHER:PAL-Combination N SHARPIN 61 I Sample position function (falling edge trigger and pull-up externally). VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.7/P.14 Pin Name Pin Number Type Function Description Test pins NC 98,105,111 ,124,126 O For test only VRB3 106 O For test only VTOP0 115 O For test only VRB4 116 O For test only UP_CLKIN 117 O For test only DN_FBIN 118 O For test only PAD120 120 Analog For test only MIOUT 122 O For test only MICPN 123 O For test only NC 124 O For test only MVCTR 125 O For test only Power and Ground AVDDADC 100,108,112 Power ADC Power AVDDDAC 69,72 Power DAC Power AVDDPLL1 127 Power GenLock PLL Power AVDDPLL2 21 Power SDRAM controller PLL Power AVDDVGC 107 Power Variable Gain Control Power DVDD 18,19,20, 27,31,47, 58,65,76, 85,99,128 Power Digital Power AVSSADC 102,103, 110,114,126 Ground ADC Ground AVSSDAC 67,74 Ground DAC ground AVSSPLL1 121 Ground GenLock PLL Ground AVSSPLL2 22 Ground SDRAM controller PLL Ground AVSSVGC 104 Ground Variable Gain Control Ground DVSS 4,5,23,24,29 ,32,45,57, 75,80,94,97, 119, Ground Digital Ground VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.8/P.14 Note 1: RSET = Bandgap / (32 LSB current) , BandGap = measure from pin “RSET” Ex. If BandGap = 1.2 V Rload = 75 Vout = 1 V (DAC 1024 bits turn on)) Then (Vout / Rload) = (1V / 75 ) = 13.33mA (1024 LSB current) è 1 LSB current = 13.02 uA è 32 LSB current = 416.67 uA So RSET = BandGap / 32 LSB = 1.2V/416.67uA=2880 =2.8 k VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.9/P.14 TYPICAL APPLICATION DIAGRAM VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.10/P.14 FUNCTIONAL DESCRIPTION Video source can be inputted directly into the chip. An internal Video processor will overwrite or mix the OSD with the video signals before digitally encoding them to composite and S-video TV outputs, which are converted by the three 10-bits DAC. VIDEO PROCESSOR The video processor control the video and OSD signals to overwrite. VIDEO ENCODER Pixels are retrieved from the external frame store memory asynchronously relative to the incoming frames. Outgoing video timing is set to the selected TV (NTSC or PAL) or progressive scan standard. Incoming data sampling is normally set to fill complete lines in the Frame Store Memory. Horizontal scaling is applied to pixels exiting the Frame Store. Pixels may be routed through either a digital video encoder or YUV-to-RGB transformation matrix. Either output is connected to a four 10-bit D/A converter to generate the video output that may be Composite Video and Y/C, RGB or YUV. VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.11/P.14 Hardware control mode The A001 is powered up to a default hardware control mode. A001 major functions can be controlled by On Screen Display Menu push buttons. Below picture show Hardware mode OSD with background enable. Red color identify being select function. Other functions, such as freeze, size, zoom, TV mode, output mode and power down, can be controlled by dedicated pins. VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.12/P.14 MECHANICAL DIMENSIONS VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.13/P.14 VX1937 Product Specification NTSC/PAL Digital Video Encoder V1.0 020829 P.14/P.14 TYPICAL APPLICATION VXIS Technology Corp., http://www.vxis.com 8th Floor, 10 Prosperity Road I, Science Based Industrial Park, Hsinchu City, Taiwan 300, R. O. C., Tel:886-3-5630888, Fax:886-3-5630889 VXIS Technology Corp., http://www.vxis.com 8th Floor, 10 Prosperity Road I, Science Based Industrial Park, Hsinchu City, Taiwan 300, R. O. C., Tel:886-3-5630888, Fax:886-3-5630889