AS3910 datasheet(36/47 Pages) AMSCO

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www.austriamicrosystems.com/HF_RFID_Reader/AS3910

Revision 2.3

36 - 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

Receiver State Display Register

Note:

At power up and after Set Default command, content of this register is set to 0.

2.4

other combinations

2.4

Table 36. Receiver State Display Register

Address # 17: Receiver State Display Register

type: R

Bit

Name

Function

Comments

7rssi_3

MSB

Stores peak value of RSSI

measurement. Automatically cleared

at beginning of transponder message

and with Clear RSSI command.

6rssi_2

5rssi_1

4rssi_0

LSB

oscok/rfp

Unlatched osc_ok flag in case nfc=0

Target activation detector output in case nfc=1

2gr_2

gr_2

gr_1

gr_0

Gain reduction

Displays status of receiver gain

reduction (result of AGC, gain

reduction setting and Squelch

command)

1gr_1

0gr_0

3 dB

21 dB

rssi_3

rssi_2

rssi_1

rssi_0

Signal on RFI1

[mVrms]

0 ~ 0.28

0.28 ~ 0.35

0.35 ~ 0.45

0.45 ~ 0.57

0.57 ~ 0.74

0.74 ~ 0.95

0.95 ~ 1.21

1.21 ~ 1.56

1.56 ~ 2.00

2.00 ~ 2.55

2.55 ~ 3.27

3.27 ~ 4.20

4.20 ~ 5.37

5.37 ~ 6.88

6.88 ~ 8.80

>8.80

Table 35. Definition

reg_3

rege_3

reg_2

rege_2

reg_1

rege_1

reg_0

rege_0

Regulated voltage

[V]

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