ADV7181B
Rev. B | Page 18 of 100
GLOBAL STATUS REGISTERS
Four registers provide summary information about the video
decoder. The IDENT register allows the user to identify the
revision code of the ADV7181B. The other three registers
contain status bits from the ADV7181B.
IDENTIFICATION
IDENT[7:0] Address 0x11[7:0]
The register identification of the revision of the ADV7181B.
An identification value of 0x11 indicates the ADV7181 released
silicon.
An identification value of 0x13 indicates the ADV7181B silicon.
STATUS 1
STATUS_1[7:0] Address 0x10[7:0]
This read-only register provides information about the internal
status of the ADV7181B.
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 Status 0 and
Status 1 are based solely on horizontal timing information 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
ADV7181B autodetection block. Consult the General Setup
section for more information on enabling the autodetection
block, and the Autodetection of SD Modes section to determine
how to configure it.
Table 13. AD_RESULT Function
AD_RESULT[2:0] Description
000 NTSM-MJ
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
Table 14. STATUS 1 Function
STATUS 1[7:0]
Bit Name
Description
0
IN_LOCK
In lock (right now).
1 LOST_LOCK
Lost lock (since last read
of this register).
2 FSC_LOCK
F
SC
locked (right 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 15. 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), and 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
F
SC
frequency is
nonstandard.
6 Reserved
7 Reserved
STATUS 3
STATUS_3[7:0], Address 0x13[7:0]
Table 16. 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 are present at output.
3
Reserved for future use.
4 FREE_RUN_ACT
ADV7181B 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.
