tda8295 NXP Semiconductors, tda8295 Datasheet - Page 35

• Manufacturer Part Number: tda8295
• Description: Tda8295 Digital Global Standard Low If Demodulator For Analog Tv And Fm Radio
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8295_1
Product data sheet
9.3.11 CVBS settings
Table 34.
Legend: * = default value.
Table 35.
Legend: * = default value.
Bit
7 to 3 -
2
1
0
Bit
7 to 0 CVBS_LVL[7:0] R/W
Symbol
FOR_BLK
AUTO_BLK
VID_LVL
Symbol
CVBS_SET register (address 1Dh) bit description
CVBS_LEVEL register (address 1Eh) bit description
Digital global standard low IF demodulator for analog TV and FM radio
Access Value Description
R/W
R/W
R/W
R/W
Rev. 01 — 4 February 2008
Access Value
-
0*
1
0*
1
0
1*
51h
5Bh
66h
73h*
81h
91h
A2h
not used
when active, the video output is always blanked, e.g. for
channel change (forced blank)
when active, the video output is blanked if the horizontal
line lock flag (N_H_LOCK, see
the video levelling stage ensures a constant and clipping
free video output level (important for excessive picture
carrier overmodulation)
no action
video blanked
auto-blanking off
auto-blanking on
video levelling stage off
video levelling stage on
Description
With this byte, the nominal video output level is freely
programmable. The format is unsigned integer (offset
binary). Settings below 40h and above C0h, which
correspond to 5 dB (40h) and +4.5 dB (C0h) related to
the default value, are forbidden. In the following some
possible settings in 1 dB steps are shown.
nominal: 1 V (p-p) video output level (sync-peak)
+1 dB nominal
+2 dB nominal
+3 dB nominal
3 dB nominal
2 dB nominal
1 dB nominal
Table
44) is not present
TDA8295
© NXP B.V. 2008. All rights reserved.
35 of 77