STA400A datasheet(46/117 Pages) STMICROELECTRONICS

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STA400A

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TIMINTG

- 8 MSBs of Timing Loop Integrator

This register contains the 8 MSBs of the timing loop integrator. The format is two’s complement.

CARINTG

- 8 MSBs of Carrier Loop Integrator

This register contains the 8 MSBs of the carrier loop integrator. The format is two’s complement.

CARFREQ

- Locked Carrier Frequency

This register is 28 bit long and is divided into four bytes; CARFREQ0 is the LSB byte, CARFREQ3 is the MSB.

It contains the carrier frequency on which the demodulator is locked. The format is two’s complement.

- Carrier to Noise Esteem

This register gives the Carrier to Noise Ratio estimation in dB. The number has a fixed point format.

b7- b3 :

Integer Part

b2- b0 :

Fractional Part

Example : CN = ’10010111’ = (100101.11)bin = (37.75)dec => C/N = 37.75dB

FLAG

- Demodulator Status Register

This is a read only register containing specific status bit of the demodulator.

b7:

LOCK

0=Demodulator Locked; 1=Demodulator Unlocked

b6:

TIMINTG_CLR 0=Timing Integrator Cleared; 1=Timing Integrator Active

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

TIMINTG

S1/S2

006C/0092

7-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

CARINTG

S1/S2

006D/0093

7-0

Type:

MultiBytes - R

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

CARFREQ3

S1/S2

0071/0097

27-24

CARFREQ2

S1/S2

0070/0096

23-16

CARFREQ1

S1/S2

006F/0095

15-8

CARFREQ0

S1/S2

006E/0094

7-0

Type:

SingleByte - R

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

S1/S2

0072/0098

7-0

Type:

SingleByte - R

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

FLAG

S1/S2

0073/0099

7-4

STA400A Datasheet(PDF) 46 Page - STMicroelectronics

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