STA400A datasheet(45/117 Pages) STMICROELECTRONICS

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STA400A

RAMPCTRL

- Frequency Sweep Control Register

This register controls the operation of the frequency sweep block.

b7:RFU

b6:

SLOPE

0=Positive; 1=Negative

b5:

SWON

0=Sweep Disabled; 1=Sweep Enabled

b4:

SWSTEP

0=Multiply by 1; 1=Multiply by 2

b3-b0:

STEPPER

0000=Divide by 1

0001=Divide by 2

1111=Divide by 16

AGC2BETA

- AGC2 Loop Gain

This register sets the AGC2 Loop Gain according to the following formula:

βAGC2 = 2AGC2BETA

b7-b3:Not Used

b2-b0:

AGC2BETA

000 -> Gain=1

011 -> Gain=8

110 -> Gain=64

001 -> Gain=2

100 -> Gain=16 111 -> Gain=0

010 -> Gain=4

101 -> Gain=32

AGC2REF

- AGC2 Reference

This registers sets the reference level or the AGC2 loop. The format is positive integer from 0 to 255 decimal.

b7-b0:

AGC2REF

Positive integer, range 0 to 255 decimal

AGC2INTG

- 8 MSBs of AGC2 Loop Integrator

This register contains the 8 MSBs of the AGC2 loop integrator. The format is two’s complement.

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

RAMPCTRL

S1/S2

0068/008E

6-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

AGC2BETA

S1/S2

0069/008F

2-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

AGC2REF

S1/S2

006A/0090

7-0

Type:

SingleByte - R/W

Word Length:

Byte Name

Address (Hex)

Bit Map

Reset Value (Hex)

AGC2INTG

S1/S2

006B/0091

7-0

STA400A Datasheet(PDF) 45 Page - STMicroelectronics

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