CC113LRGPR datasheet(63/87 Pages) TI2

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CC113L

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SWRS108B – MAY 2011 – REVISED JUNE 2014

Table 5-48. 0x1C: AGCCTRL1 - AGC Control (continued)

Bit

Field Name

Reset

R/W

Description

Sets the absolute RSSI threshold for asserting carrier sense. The

2-complement signed threshold is programmed in steps of 1 dB

and is relative to the MAGN_TARGET setting.

Carrier sense absolute threshold (Equal to

Setting

channel filter amplitude when AGC has not

decreased gain)

-8 (1000)

Absolute carrier sense threshold disabled

CARRIER_SENSE_ABS_

-7 (1001)

7 dB below MAGN_TARGET setting

3:0

0 (0000)

R/W

THR[3:0]

…

-1 (1111)

1 dB below MAGN_TARGET setting

0 (0000)

At MAGN_TARGET setting

1 (0001)

1 dB above MAGN_TARGET setting

…

7 (0111)

7 dB above MAGN_TARGET setting

Table 5-49. 0x1D: AGCCTRL0 - AGC Control

Bit

Field Name

Reset

R/W

Description

Sets the level of hysteresis on the magnitude deviation (internal

AGC signal that determine gain changes).

Setting

Description

No hysteresis, small symmetric dead zone, high

0 (00)

gain

7:6

HYST_LEVEL[1:0]

2 (10)

R/W

Low hysteresis, small asymmetric dead zone,

1 (01)

medium gain

Medium hysteresis, medium asymmetric dead

2 (10)

zone, medium gain

Large hysteresis, large asymmetric dead zone,

3 (11)

low gain

Sets the number of channel filter samples from a gain

adjustment has been made until the AGC algorithm starts

accumulating new samples.

Setting

Channel filter samples

5:4

WAIT_TIME[1:0]

1 (01)

R/W

0 (00)

1 (01)

2 (10)

3 (11)

Control when the AGC gain should be frozen.

Setting

Function

Normal operation. Always adjust gain when

0 (00)

required.

The gain setting is frozen when a sync word has

1 (01)

3:2

AGC_FREEZE[1:0]

0 (00)

R/W

been found.

Manually freeze the analogue gain setting and

2 (10)

continue to adjust the digital gain.

Manually freezes both the analogue and the

3 (11)

digital gain setting. Used for manually overriding

the gain.

Detailed Description

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