ADV7183ABST datasheet(23/104 Pages) AD

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ADV7183A

Rev. A | Page 23 of 104

AD_SECAM_EN Enable Autodetection of SECAM (SDP),

Address 0x07, [6]

Table 32. AD_SECAM_EN Function

AD_SECAM_EN

Description

Disable the autodetection of SECAM.

Enable the detection.

*Default value.

AD_N443_EN Enable Autodetection of NTSC 443 (SDP),

Address 0x07, [5]

Table 33. AD_N443_EN Function

AD_N443_EN

Description

Disable the autodetection of NTSC style

systems with a 4.43 MHz color subcarrier.

Enable the detection.

*Default value.

AD_P60_EN Enable Autodetection of PAL60 (SDP),

Address 0x07, [4]

Table 34. AD_P60_EN Function

AD_P60_EN

Description

Disable the autodetection of PAL systems with a

60 Hz field rate.

Enable the detection.

*Default value.

AD_PALN_EN Enable Autodetection of PAL N (SDP),

Address 0x07, [3]

Table 35. AD_PALN_EN Function

AD_PALN_EN

Description

Disable the detection of the PAL N standard.

Enable the detection.

*Default value.

AD_PALM_EN Enable Autodetection of PAL M (SDP),

Address 0x07, [2]

Table 36. AD_PALM_EN Function

AD_PALM_EN

Description

Disable the autodetection of PAL M.

Enable the detection.

*Default value.

AD_NTSC_EN Enable Autodetection of NTSC (SDP),

Address 0x07, [1]

Table 37. AD_NTSC_EN Function

AD_NTSC_EN

Description

Disable the detection of standard NTSC.

Enable the detection.

*Default value.

AD_PAL_EN Enable Autodetection of PAL (SDP),

Address 0x07, [0]

Table 38. AD_PAL_EN Function

AD_PAL_EN

Description

Disable the detection of standard PAL.

Enable the detection.

*Default value.

SFL_INV Subcarrier Frequency Lock Inversion (SDP)

This bit controls the behavior of the PAL switch bit in the SFL

(GenLock Telegram) data stream. It was implemented to solve

some compatibility issues with video encoders. It solves two

problems:

The PAL switch bit is only meaningful in PAL. Some

encoders (including Analog Devices encoders) also look at

the state of this bit in NTSC.

There was a design change in Analog Devices encoders

from ADV717x to ADV719x. The older versions used the

SFL (GenLock Telegram) bit directly, while the later ones

invert the bit prior to using it. The reason for this is that the

inversion compensated for the 1-line delay of an SFL

(GenLock Telegram) transmission.

As a result:

ADV717x encoders need the PAL switch bit in the SFL

(GenLock Telegram) to be 1 for NTSC to work.

ADV7190/ADV7191/ADV7194 encoders need the PAL

switch bit in the SFL to be 0 to work in NTSC.

If the state of the PAL switch bit is wrong, a 180°phase shift

occurs.

In a decoder/encoder back-to-back system in which SFL is used,

this bit must be set up properly for the specific encoder used.

Table 39. SFL_INV Function

SFL_INV

Address 0x41, [6]

Description

SFL compatible with ADV7190/ADV7191/

ADV7194 encoders.

SFL compatible with ADV717x/ADV7173x

encoders.

*Default value.

ADV7183ABST Datasheet(PDF) 23 Page - Analog Devices

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