STV2310 datasheet(70/112 Pages) STMICROELECTRONICS

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STV2310

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DDECCONT16

DDECCONT17

Address (hex): 16h

Reset Value (bin): 0111 1010

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

SATLMTLN[1:0]

SATLMTPT[1:0]

SMHITH[1:0]

ACTITH[1:0]

Bit Name

Function

SATLMTLN[1:0]

SATLMTPT[1:0]

AGC Saturation Limit (Points/Lines)

The SATLMTPT[1:0] and SATLMTLN[1:0] bits are used to program the CVBS Saturation Threshold. It is

expressed as a number of samples per field (when, according to the algorithm, the number of samples is

reached, the gain is decreased). The formula for the threshold computation is the following:

Threshold = 1 + 4 x SATLMTPT[1:0] +16 x SATLMTLN[1:0]

SMHITH[1:0]

AGC SMHI Threshold Value

This bitfield defines the Luma Low Signal Detection Threshold (when, according to the algorithm, the luma

signal remains under that threshold, the gain is increased). The threshold is defined as an ADC (10 bit)

code output according to the following formula:

Threshold = 772 + 8 x SMHITH[1:0] (Default = 772 + 8 x 2)

ACTITH[1:0]

AGC ACTI Threshold Value

This bitfield defines the Luma Saturation Threshold (when, according to the algorithm, the luma signal

overtakes that threshold, the gain is decreased). The threshold is defined as an ADC (10 bit) code output

according to the following formula:

Threshold = 807 + 8 x ACTITH[1:0] (Default = 807 + 8 x 2)

Address (hex): 17h

Reset Value (bin): 0010 0100

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

STI_NB_FIELDS_CONFIRM[2:0]

Bit Name

Function

Bit 7

Reserved. Must be set to 1. Recommended value: 1 (instead of 0 at reset).

Bit 6

Reserved. Must be set to 1.

STI_50_60HZ_

Standard ID Enable

This bit modifies the standard identification algorithm. When this bit is set (default), the standard

identification algorithm disregards the auto identification table entries not corresponding to the 50 or 60Hz

detection performed by the synchronization block.

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