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STV2249 数据表(PDF) 56 Page - STMicroelectronics |
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STV2249 数据表(HTML) 56 Page - STMicroelectronics |
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56 / 86 page  Obsolete Product(s) - Obsolete Product(s) STV224X, STV228X, STV223X - I²C BUS SELECTION 56/86 6.5 POWER-ON RESET - INITIAL BUS REGISTER CONDITIONS Power-On Reset is active when the power supply VCCD is below 3 Volts. All data from all registers must be written by microprocessor after power-on. Unused data must be set to 0. POR values are not tested during production. Reg. Addr. (Hex) Initial Data Value Comments d7 d6 d5 d4 d3 d2 d1 d0 00 100000 00 PIFVCO free running fine adjustment Typical. 01 000001 11 PIFVCO coarse typ, BG = 38.9 MHz, Negative modulation, AFC active, no PIF over-modulation regulation. 02 000100 00 CVBS amplitude Typical, 2VPP. 03 001000 00 Tuner AGC starting point Typical, Tuner AGC gain Min. 04 000000 00 FM/AM out selected, FM de-emphasis and FM deviation auto-control, FM demod. active, FM out selected, QSS and AM demod. active. 05 011111 11 Volume control attenuation at maximum, linear curve (dB). 06 000000 00 PIF < 42 MHz, 6.5 MHz sound carrier selected, auto AGC SIF time constant, saw filter switch control at low level, CVBS out enabled, QSS mode. 07 001000 00 Contrast at middle, blue screen disabled. 08 001000 00 Saturation at middle, half contrast disabled, oversize blanking disabled. 09 001000 00 Brightness at middle, RGB Blanking not active. 0A 001000 00 Red drive at middle, RGBext insertion enabled (FBext Pin control). 0B 001000 00 Green drive at middle, black stretch disabled, black stretch ref 0IRE. 0C 001000 00 Blue drive at middle, cut-off loop active. 0D 001000 00 Red cut-off at middle, automatic cut-off loop. 0E 001000 00 Green cut-off at middle. 0F 000010 00 Peaking on luma at middle, coring off, trap ON (CVBS & color identified), CVBS2 ON, white insertion not active. 10 000100 00 APR disabled, APR threshold at middle, RGB OSD contrast disabled. 11 000000 00 No shift of bell filter center frequency, 0dB P/N demod. gain, 90° matrix selection, ACC overload ON. 12 000000 00 No shift of bandpass center frequency, chroma reference output off, chroma delay line on. 13 000000 00 Two crystals application P/S/N, PAL XTAL1 forced mode, two crystal applications. 14 001000 00 Hue at middle, flesh disabled, normal flesh characteristic. 15 000000 00 CVBS1 selected on main CVBS output, CVBS1 selected on second CVBS output, CVBS mode. 16 001000 00 Horizontal shift at middle, horizontal output enabled, interlace mode. 17 001000 00 Vertical amplitude at middle, auto 50/60 Hz identification. 18 000010 00 Vertical position at middle, automatic time constant selection on PLL1, PLL1 active, Vertical synchronization active. 19 000000 00 0.1 V low level at pin VERT, frame blanking adapted to standard, noise detector low threshold. 1A 000000 00 Not active, auto cut-off. 1B 000000 00 Not active, auto cut-off. 1C 000000 00 Not active, auto cut-off. 1D 000000 00 R-Y output at pin 29 (SDIP56) 1E 000000 00 Not to be used, except d4: Auto. SIF AGC time constant control in L/L’ standards. 1F 000000 00 VERT pulse active, standard luma delay, AVL off, AM/FM mono sound selected. |
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