AS3910-BQFP 查看數據表（PDF） - austriamicrosystems AG

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AS3910-BQFP

13.56 MHz RFID Reader IC, ISO-14443 A/B

austriamicrosystems AG 

AS3910

Data Sheet - Application Information

Table 16. Receiver Configuration Register

Address # 06: Receiver Configuration Register

Bit Name Def.

Function

7 agc_en 0 1 → AGC is enabled

1 → AGC operate on first eight subcarrier pulses

6 agc_m 0 0 → AGC operate during complete receive period

5

rg2

0 rg2 rg1 rg0

Gain reduction

4

rg1

0

0

0

0

0

0

0

1

3 dB

-

-

-

3 rg0

0

-

-

-

1

1

1

-

-

21 dB

type: RW

Comments

AGC operation mode

Gain reduction in 3dB steps. From 0

to 21dB.

2

fs2

0 fs2 fs1 fs0

Filter Selection

Comment

Filter selection is automatically set

when ISO mode or receive data rate

change (Change of ISO mode

definition register). After automatic

preset filter, selection can be

changed by writing these bits.

1

fs1

0

0

0

0 ISO-14443A 106 kb/s

Automatic preset

0

0

1 ISO-14443B 106 kb/s

Automatic preset

0

1

0 ISO-14443A/B 212 kb/s Automatic preset

0

1

1 ISO-14443A/B 424 kb/s Automatic preset

0

fs0

0

1

0

0 ISO-14443A/B 848 kb/s Automatic preset

1

1

0 424/484 kHz subcarriers No automatic preset

1

1

1 212 kHz

No automatic preset

Other combinations not supported or used for

block testing purposes

Note: Default setting is set at power up and after Set Default command, filter selection bits are preset also when ISO mode or receive data

rate change.

www.austriamicrosystems.com/HF_RFID_Reader/AS3910

Revision 2.3

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