STA400A datasheet(44/117 Pages) STMICROELECTRONICS

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STA400A

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ALFACAR

- Carrier Loop Filter Alpha Parameter

This register sets the proportional gain of the carrier loop. It must be loaded with a positive integer number from

0x00 to 0xFF (0 to 255 decimal).

b7-b0:

ALPHA

Positive integer, range 0 to 255 decimal.

BETACAR

- Carrier Loop Filter Beta Parameter

This register sets the integral gain of the carrier loop. The representation of the number is mantissa-exponent

(base 2): beta = beta_m x 2(beta_e)

b7-b5:

BETA_E

Exponent of the number. Positive integer, range 0 to 7 decimal.

b4-b0:

BETA_M

Mantissa of the number. Positive integer, range 0 to 31 decimal.

ALFATIM

- Timing Loop Filter Alpha Parameter

This register sets the proportional gain of the timing loop. It must be loaded with a positive integer number from

0x00 to 0xFF (0 to 255 decimal).

b7-b0:

ALPHA

Positive integer, range 0 to 255 decimal.

BETATIM

- Timing Loop Filter Beta Parameter

This register sets the integral gain of the timing loop. The representation of the number is mantissa-exponent

(base 2): beta = beta_m x 2(beta_e)

b7-b5:

BETA_E

Exponent of the number. Positive integer, range 0 to 7 decimal.

b4-b0:

BETA_M

Mantissa of the number. Positive integer, range 0 to 31 decimal.

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

ALFACAR

S1/S2

0064/008A

7-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

BETACAR

S1/S2

0065/008B

7-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

ALFATIM

S1/S2

0066/008C

7-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

BETATIM

S1/S2

0067/008D

7-0

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