Datasheet

TVP5154A
www.ti.com SLES214C–DECEMBER 2007–REVISED SEPTEMBER 2010
7.2.54 Status Register #2
Address 89h
7 6 5 4 3 2 1 0
Reserved Weak signal detection PAL switch polarity Field sequence status AGC and offset frozen status Reserved
Weak signal detection:
0 = No weak signal
1 = Weak signal mode
PAL switch polarity of first line of odd field:
0 = PAL switch is 0.
1 = PAL switch is 1.
Field sequence status:
0 = Even field
1 = Odd field
AGC and offset frozen status:
0 = AGC and offset are not frozen.
1 = AGC and offset are frozen.
7.2.55 Status Register #3
Address 8Ah
7 6 5 4 3 2 1 0
Analog gain Digital gain
Analog gain: 4-bit front-end AGC analog gain setting
Digital gain: 4 MSBs of 6-bit front-end AGC digital gain setting
The product of the analog and digital gain is given below.
Gain Product = (1 + 3 × analog_gain/15) × (1 + gain_step × digital_gain/4096)
Where,
0 ≤ analog_gain ≤ 15
0 ≤ digital_gain ≤ 63
The gain_step setting as a function of the analog_gain setting is shown below.
analog_gain gain_step
0 61
1 55
2 48
3 44
4 38
5 33
6 29
7 26
8 24
9 22
10 20
11 19
12 18
13 17
14 16
15 15
Copyright © 2007–2010, Texas Instruments Incorporated Internal Control Registers 59
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