STA400A datasheet(109/117 Pages) STMICROELECTRONICS

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STA400A

Cf_DeltaCntHigh_M

- Coarse Frequency Estimation Confidence Threshold

This value is the number of subsequent good estimates for enlarging the confidence threshold by an increment

of register 0x0728

Cf_InitDelay_M

- Coarse Frequency Estimation Initial Delay

This value determines the minimum number of AMSS estimates stored in the sliding window average before the

first estimate is put out. For the calculation of the first cf estimate, Cf_InitDelay_M+1 estimates are taken into

account. Within the initial phase no confidence threshold is applied and all estimates are good. Nevertheless

the confidence threshold is calculated and used for the Cf_InitDelay_M+2nd estimate.

Cf_KexpThAct_M

- Current Confidence Threshold Value

This register hold the current confidence threshold value the CF algorithm takes to distinguish between good

and bad Coarse Frequency estimates. If the internally calculated confidence value is equal or larger than the

current threshold the estimate is considered as good.

Cf_EstAct_M

- Coarse Frequency Estimation of AMSS Before Averaging

With each received AMSS sequence a new frequency estimate is calculated together with a confidence value.

Then an averaging over good estimates is performed. Within this register the coarse frequency estimate of the

received AMSS before averaging is held.

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

Cf_DeltaCntHigh2_M

072A

9-8

Cf_DeltaCntHigh1_M

0729

7-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

Cf_InitDelay_M

072B

4-0

Type:

SingleByte - R

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

Cf_KexpThAct_M

072D

7-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

Cf_EstAct2_M

0731

15-8

Cf_EstAct1_M

0730

7-0

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