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AK8850 Dataheets PDF



Part Number AK8850
Manufacturers Asahi Kasei Microsystems
Logo Asahi Kasei Microsystems
Description NTSC Digital Video Decoder
Datasheet AK8850 DatasheetAK8850 Datasheet (PDF)

www.DataSheet4U.com ASAHI KASEI [AK8850] AK8850 NTSC Digital Video Decoder General Description The AK8850 decodes NTSC composite video, S-Video and Component Video signals (525/625) into digital formats. Digital output conforms to ITU-R BT.601 and ITU-R BT.656* YCrCb specifications. The AK8850 outputs a control signal to generate clocks synchronized with either Horizontal Sync or Vertical Sync signals. Its clock rate is 27 MHz. An encoded VBID Closed Caption signal can be extracted from the v.

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www.DataSheet4U.com ASAHI KASEI [AK8850] AK8850 NTSC Digital Video Decoder General Description The AK8850 decodes NTSC composite video, S-Video and Component Video signals (525/625) into digital formats. Digital output conforms to ITU-R BT.601 and ITU-R BT.656* YCrCb specifications. The AK8850 outputs a control signal to generate clocks synchronized with either Horizontal Sync or Vertical Sync signals. Its clock rate is 27 MHz. An encoded VBID Closed Caption signal can be extracted from the video signal and sent to an external pin on the AK8850. Features NTSC-M Composite signal and S-Video signal decoder Component Video decoder for 525 / 625 systems ( Betacam,MII,EBU N10 ) On-chip triple 10-Bit ADCs ( 27 MHz operation ) On-chip Programmable Gain Amp ( PGA ), ranging from 0 dB to 12 dB in 0.1 dB / steps Input-synchronized clock is generated by an external VCXO Sub-Carrier generation by Digital Synthesizer ( DFS ) Auto Color Control ( ACC ) Auto Gain Control ( AGC ) Adaptive 3-line Y-C separation ITU-R BT.656 format output ( 4:2:2 8-Bit parallel output with EAV / SAV ) NTSC Closed Caption signal decoding function VBID Program condition decoding function WSS Program condition decoding function Video Aspect Signal decoding function on Line 16 and Line 279 Sleep function 6–channel Analog inputs I2C Control 3.3 V CMOS 100-Pin LQFP package note: * ITU-R BT.656 spec may not be satisfied, as it is dependent upon input signal quality. Rev.0 1 2002/01 www.DataSheet4U.com ASAHI KASEI 1. Functional Block Diagram IVCXO CLK CLKINV [AK8850] NSTD LLPF LLPFC FLPF FLPFC IRefR1 CLOCK Module 27MHz Phase Error Timing Contorller & NSIG CLK27MOUT HALFCLKOUT DVALID/VLOCK VSYNC HSYNC FIELD FRAME0 FRAME1/CSYNC LumaProcessing & VCO Controller & Sync-Separatio n & Registers AGC Info. EXTCLP & Closed Caption VBID Extraction Y AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 SYNC1 SYNC2 SYNC3 FBCAP1 FBCAP2 FBCAP3 CLPCAP1 CLPCAP2 VREF 13.5MHz Analog Multiplexer Clamp PGA Sync Separator Composite Y Y/C Separation (2D-3Line or 1D-BPF) Image Ctrl (Brightness, Contrast etc.) U 10-bit ADC 10-bit ADC 10-bit ADC C C /U Decimation Filter ChromaProcessing & V U Output Processing (Level Shifter & Rec.656 formatter etc.) with Buffer D[7:0] V ACC DFS (Chroma PLL) & V Image Ctrl (HUE,Saturation) Microprocessor I/F VRPVideo VCOM VRNinVREF AVSS site 1-1. SignalAVDD Path ( Compo signal put ) IRefR2 SELA SDA SCL /RESET PD DVDD DVSS Rev.0 2 2002/01 www.DataSheet4U.com ASAHI KASEI IVCXO CLK CLKINV [AK8850] LLPF LLPFC FLPF FLPFC IRefR1 Sync-Separatio n & NSTD Phase Error CLOCK Module 27MHz Timing Contorller & NSIG CLK27MOUT HALFCLKOUT DVALID/VLOCK VSYNC HSYNC FIELD FRAME0 FRAME1/CSYNC LumaProcessing & VCO Controller & Registers AGC Info. EXTCLP & Closed Caption VBID Extraction Composite AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 SYNC1 SYNC2 SYNC3 FBCAP1 FBCAP2 FBCAP3 CLPCAP1 CLPCAP2 AVDD VREF Composite Y/C Separation (2D-3Line or 1D-BPF) Y Image Ctrl (Brightness, Contrast etc.) Y Analog Multiplexer Clamp PGA Sync Separator 10-bit ADC Composite C Decimation Filter Output Processing (Level Shifter & Rec.656 formatter etc.) with Buffer U D[7:0] ChromaProcessing & ACC DFS 13.5MHz (Chroma PLL) & V Image Ctrl (HUE,Saturation) Microprocessor I/F 1-2. Signal Path ( YC signal input ) AVSS VRP VCOM VRN VREF IRefR2 SELA SDA SCL /RESET PD DVDD DVSS Rev.0 3 2002/01 www.DataSheet4U.com ASAHI KASEI IVCXO CLK CLKINV [AK8850] LLPF LLPFC FLPF FLPFC IRefR1 Sync-Separatio n & NSTD Phase Error CLOCK Module 27MHz Timing Contorller & NSIG CLK27MOUT HALFCLKOUT DVALID/VLOCK VSYNC HSYNC FIELD FRAME0 FRAME1/CSYNC Y VCO Controller & Registers AGC Info. EXTCLP & Closed Caption VBID Extraction LumaProcessing & Y AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 SYNC1 SYNC2 SYNC3 FBCAP1 FBCAP2 FBCAP3 CLPCAP1 CLPCAP2 VREF 13.5MHz C Y Image Ctrl 10-bit ADC 10-bit ADC (Brightness, Contrast etc.) Y Analog Multiplexer Clamp PGA Sync Separator C C Decimation Filter ChromaProcessing & U Output Processing (Level Shifter & Rec.656 formatter etc.) with Buffer D[7:0] ACC DFS (Chroma PLL) & V Image Ctrl (HUE,Saturation) Microprocessor I/F 1-3. Signal Path ( Component signal input ) VCOM VRN VREF IRefR2 AVDD AVSS VRP IVCXO CLK SELA SDA SCL /RESET PD DVDD DVSS CLKINV Rev.0 LLPF FLPFC CLOCK Phase Error 4 2002/01 NSTD NSIG CLK27MOUT HALFCLKOUT Timing Contorller www.DataSheet4U.com ASAHI KASEI [AK8850] Rev.0 5 2002/01 ASAHI KASEI 2. Pin Assignment www.DataSheet4U.com [AK8850] VREFOUT CLPCAP1 CLPCAP2 EXTCLP FBCAP1 FBCAP2 FBCAP3 IRefR1 IVCXO FLPF LLPFC VCOM FLPFC IRefR2 AVDD AVDD AVSS DVDD AVSS AVSS AIN1 AVSS SYNC1 AVSS AIN2 AVSS SYNC2 AVSS AIN3 AVSS SYNC3 AVSS AVDD AVSS AVSS AIN4 AVSS AIN5 AVSS AIN6 AVSS TEST PD TEST TEST 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 .


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