Datasheet

TVP5147M1
www.ti.com SLES140G –JULY 2005–REVISED FEBRUARY 2012
Table 2-54. Status 2 Register
Subaddress 3Bh
Read only
7 6 5 4 3 2 1 0
Signal present Weak signal PAL switch Field sequence Color killed Macrovision detection [2:0]
detection polarity status
Signal present detection:
0 = Signal not present
1 = Signal present
Weak signal detection:
0 = No weak signal
1 = Weak signal mode
PAL switch polarity of first line of odd field:
0 = PAL switch is 0b
1 = PAL switch is 1b
Field sequence status:
0 = Even field
1 = Odd field
Color killed:
0 = Color killer not active
1 = Color killer activated
Macrovision detection [2:0]:
000 = No copy protection
001 = AGC pulses/pseudo syncs present (Type 1)
010 = 2-line colorstripe only present
011 = AGC pulses/pseudo syncs and 2-line colorstripe present (Type 2)
100 = Reserved
101 = Reserved
110 = 4-line colorstripe only present
111 = AGC pulses/pseudo syncs and 4-line colorstripe present (Type 3)
Table 2-55. AGC Gain Status Register
Subaddress 3Ch–3Dh
Read only
Subaddress 7 6 5 4 3 2 1 0
3Ch Fine Gain [7:0]
3Dh Coarse Gain [3:0] Fine Gain [11:8]
Fine gain [11:0]:
This register provides the fine gain value of sync channel.
1111 1111 1111 = 1.9995
1000 0000 0000 = 1
0010 0000 0000 = 0.5
Coarse gain [3:0]:
This register provides the coarse gain value of sync channel.
1111 = 2
0101 = 1
0000 = 0.5
The AGC gain status register is updated automatically by the TVP5147M1 decoder when AGC is on. In manual gain control mode, these
register values are not updated by the TVP5147M1 decoder.
Copyright © 2005–2012, Texas Instruments Incorporated Functional Description 59
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