www.austriamicrosystems.com/HF_RFID_Reader/AS3910

Revision 2.3

27 - 47

AS3910

Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

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.

Table 16. Receiver Configuration Register

Address # 06: Receiver Configuration Register

type: RW

Bit

Name

Def.

Function

Comments

7

agc_en

0

1

→ AGC is enabled

AGC operation mode

6

agc_m

0

1

→ AGC operate on first eight subcarrier pulses

0

→ AGC operate during complete receive period

5rg2

0

rg2

rg1

rg0

Gain reduction

Gain reduction in 3dB steps. From 0

to 21dB.

4

rg1

00

00

0

3rg0

0

00

1

3 dB

-

-

-

-

-

-

-

-

1

1

1

21 dB

2fs2

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

00

00

ISO-14443A 106 kb/s

Automatic preset

0fs0

0

00

1

ISO-14443B 106 kb/s

Automatic preset

01

0

ISO-14443A/B 212 kb/s

Automatic preset

01

1

ISO-14443A/B 424 kb/s

Automatic preset

10

0

ISO-14443A/B 848 kb/s

Automatic preset

11

0

424/484 kHz subcarriers

No automatic preset

11

1

212 kHz

No automatic preset

Other combinations not supported or used for

block testing purposes