Datasheet

ADV7184
Rev. A | Page 23 of 112
GLOBAL STATUS REGISTERS
Three registers provide summary information about the video
decoder: Status Register 1, Status Register 2, and Status Register 3.
These registers contain status bits that report operational information
to the user.
Status Register 1 [7:0], Address 0x10 [7:0]
This read-only register provides information about the internal
status of the ADV7184. See the
CIL [2:0], Count-Into-Lock,
Address 0x51 [2:0]
and the COL [2:0], Count-Out-of-Lock,
Address 0x51 [5:3]
sections for information on the timing.
Depending on the setting of the FSCLE bit, the IN_LOCK [0] and
LOST_LOCK [1] bits of Status Register 1 are based solely on the
horizontal timing information or on the horizontal timing and
lock status of the color subcarrier. See the
FSCLE, F
SC
Lock
Enable, Address 0x51 [7]
section.
AD_RESULT [2:0], Autodetection Result, Address 0x10 [6:4]
These bits report the findings from the autodetection block. For
more information on enabling the autodetection block, see the
General Setup section. For information on configuring this
block, see the
Autodetection of SD Modes section.
Table 20. AD_RESULT Function
AD_RESULT [2:0] Description
000 NTSC M/J
001 NTSC 443
010 PAL M
011 PAL 60
100 PAL B/G/H/I/D
101 SECAM
110 PAL Combination N
111 SECAM 525
Status Register 2 [7:0], Address 0x12 [7:0]
See Table 22.
Status Register 3 [7:0], Address 0x13 [7:0]
See Table 23.
Table 21. Status Register 1 Function
Status Register 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 F
SC
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 is active.
Table 22. Status Register 2 Function
Status Register 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 pseudosync pulses.
3 MV_AGC DET Detected Macrovision AGC pulses.
4 LL_NSTD Line length is nonstandard.
5 FSC_NSTD F
SC
frequency is nonstandard.
6 Reserved
7 Reserved
Table 23. Status Register 3 Function
Status Register 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 CVBS Indicates if a CVBS signal is detected in composite/S-video autodetection configuration.
4 FREE_RUN_ACT
Indicates if the ADV7184 is in free-run mode. Outputs a blue screen by default. See the
DEF_VAL_AUTO_EN, Default Value Automatic Enable, Address 0x0C [1] section for details
about disabling this function.
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.