AS3911 datasheet(77/149 Pages) AMSCO

77 / 149 page

ams Datasheet, Confidential: 2013-Oct [2-03]

AS3911 – 77

Appl icatio n I n f o rm a t i o n

Receiver Configuration Register 3

Figure 59:

Receiver Configuration Register 3

Note:

Default setting is set at power-up and after Set Default command.

Address 0Ch: Receiver Configuration Register 3 (1st stage

gain settings)

Type: RW

Bit

Name

Default

Function

Comments

rg1_am2

Gain reduction/boost in first gain

stage of AM channel.

0: Full gain

1-6: Gain reduction 2.5 dB per

step (15 dB total)

7: Boost +5.5 dB

rg1_am1

rg1_am0

rg1_pm2

Gain reduction/boost in first gain

stage of PM channel.

0: Full gain

1-6: Gain reduction 2.5 dB per

step (15 dB total)

7: Boost +5.5 dB

rg1_pm1

rg1_pm0

1lim

1: Clip output of 1st and 2nd

stage

Signal clipped to 0.6 V, preset

for NFCIP-1 active

communication mode

0rg_nfc

1: Forces gain reduction in 2nd

and 3rd gain stage to -6 dB and

maximum comparator window

Preset for NFCIP-1 active

communication mode

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