adv7180 Analog Devices, Inc., adv7180 Datasheet - Page 21

• Manufacturer Part Number: adv7180
• Description: 10-bit, 4 X Oversampling Sdtv Video Decoder
• Manufacturer: Analog Devices, Inc.

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]
000
001
010
011
100
101
110
111
Description
NTSM M/J
NTSC 4.43
PAL M
PAL 60
PAL B/G/H/I/D
SECAM
PAL Combination N
SECAM 525
Rev. B | Page 21 of 112
Table 17. Status_1 Function
STATUS_1
[7:0]
0
1
2
3
4
5
6
7
STATUS 2
STATUS_2[7:0], Address 0x12 [7:0]
Table 18. STATUS_2 Function
STATUS_2
[7:0]
0
1
2
3
4
5
6
7
STATUS 3
STATUS_3[7:0], Address 0x13 [7:0]
Table 19. STATUS_3 Function
STATUS_3
[7:0]
0
1
2
3
4
5
6
7
Bit Name
IN_LOCK
LOST_LOCK
FSC_LOCK
FOLLOW_PW
AD_RESULT[0]
AD_RESULT[1]
AD_RESULT[2]
COL_KILL
Bit Name
MVCS DET
MVCS T3
MV PS DET
MV AGC DET
LL NSTD
FSC NSTD
Reserved
Reserved
Bit Name
INST_HLOCK
GEMD
SD_OP_50Hz
FREE_RUN_ACT
STD FLD LEN
INTERLACED
PAL_SW_LOCK
Result of autodetection
Result of autodetection
Result of autodetection
Detected Macrovision color striping
Macrovision color striping
protection; conforms to Type 3 if
high, Type 2 if low
Detected Macrovision pseudo
sync pulses
Detected Macrovision AGC pulses
Line length is nonstandard
F
Description
In lock (now)
Lost lock (since last read of this
register)
F
AGC follows peak white
algorithm
Color kill active
Description
Description
Horizontal lock indicator
(instantaneous)
Gemstar detect
Flags whether 50 Hz or 60 Hz is
present at output
Reserved for future use
ADV7180 outputs a blue screen
(see the DEF_VAL_EN, Default
Value Enable, Address 0x0C [0]
section)
Field length is correct for
currently selected video standard
Interlaced video detected (field
sequence found)
Reliable sequence of swinging
bursts detected
SC
SC
locked (now)
frequency is nonstandard
ADV7180