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ADV7180 Datasheet(PDF) 21 Page - Analog Devices |
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ADV7180 Datasheet(HTML) 21 Page - Analog Devices |
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21 / 112 page  ADV7180 Rev. A | Page 21 of 112 GLOBAL STATUS REGISTER Four registers provide summary information about the video decoder. The IDENT register allows the user to identify the revision code of the ADV7180. The other three registers contain status bits from the ADV7180. IDENTIFICATION IDENT[7:0], Address 0x11 [7:0] The register identification of the revision of the ADV7180. An identification value of 0x18 indicates the ADV7180. STATUS 1 STATUS_1[7:0], Address 0x10 [7:0] This read-only register provides information about the internal status of the ADV7180. See the CIL[2:0], Count Into Lock, Address 0x51 [2:0] section and the COL[2:0], Count Out of Lock, Address 0x51 [5:3] section for details on timing. Depending on the setting of the FSCLE bit, the Status Register 0 and Status Register 1 are based solely on horizontal timing infor- mation or on the horizontal timing and lock status of the color subcarrier. See the FSCLE, FSC Lock Enable, Address 0x51 [7] section. AUTODETECTION RESULT AD_RESULT[2:0], Address 0x10 [6:4] The AD_RESULT[2:0] bits report back on the findings from the ADV7180 autodetection block. Consult the General Setup section for more information on enabling the autodetection block and the Autodetection of SD Modes section for more information on how to configure it. Table 16. AD_RESULT Function AD_RESULT[2:0] Description 000 NTSM M/J 001 NTSC 4.43 010 PAL M 011 PAL 60 100 PAL B/G/H/I/D 101 SECAM 110 PAL Combination N 111 SECAM 525 Table 17. Status_1 Function STATUS_1 [7:0] Bit Name Description 0 IN_LOCK In lock (now) 1 LOST_LOCK Lost lock (since last read of this register) 2 FSC_LOCK FSC locked (now) 3 FOLLOW_PW AGC follows peak white algorithm 4 AD_RESULT[0] Result of autodetection 5 AD_RESULT[1] Result of autodetection 6 AD_RESULT[2] Result of autodetection 7 COL_KILL Color kill active STATUS 2 STATUS_2[7:0], Address 0x12 [7:0] Table 18. STATUS_2 Function STATUS_2 [7:0] Bit Name Description 0 MVCS DET Detected Macrovision color striping 1 MVCS T3 Macrovision color striping protection; conforms to Type 3 if high, Type 2 if low 2 MV PS DET Detected Macrovision pseudo sync pulses 3 MV AGC DET Detected Macrovision AGC pulses 4 LL NSTD Line length is nonstandard 5 FSC NSTD FSC frequency is nonstandard 6 Reserved 7 Reserved STATUS 3 STATUS_3[7:0], Address 0x13 [7:0] Table 19. STATUS_3 Function STATUS_3 [7:0] Bit Name Description 0 INST_HLOCK Horizontal lock indicator (instantaneous) 1 GEMD Gemstar detect 2 SD_OP_50Hz Flags whether 50 Hz or 60 Hz is present at output 3 Reserved for future use 4 FREE_RUN_ACT ADV7180 outputs a blue screen (see the DEF_VAL_EN, Default Value Enable, Address 0x0C [0] section) 5 STD FLD LEN Field length is correct for currently selected video standard 6 INTERLACED Interlaced video detected (field sequence found) 7 PAL_SW_LOCK Reliable sequence of swinging bursts detected |
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