AS3953A-BDFM datasheet(52/71 Pages) AMSOSRAM

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ams Datasheet

Page 51

[v1-05] 2019-Feb-15

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AS3953A − Detailed Description

Figure below defines the coding of the Bit Rate.

Figure 57:

Bit Rate Coding

Note(s):

1. In case a bit rate which is not supported is selected, the Tx / Rx operation is disabled.

Display Registers

Figure 58:

RFID Status Display Register

Note(s):

1. The information read from this register can be false during reception (the logic state change during reception and the readout of

status can be done just at the moment when the status is changing).

2. The RFID Status Display Register is not a real register. By reading this register, controller has access to specific RFID logic internal

signals in order to observe its internal state.

Rate3

Rate2

Rate1

Rate0

Bit Rate [kbit/s]

Comments

fc/128 (~106)

fc/64 (~212)

fc/32 (~424)

fc/16 (~848)

Other combinations RFU

Address# 04h: RFID Status Display

Type: R

Bit

Name

Function

Comments

7hf_pon

1: PICC AFE is active

AFE Power-on signal

6state<2>

000: POWER OFF

001: IDLE

010: READY 011 – ACTIVE

101: HALT

110: READYX

111: ACTIVEX

100: L4

PICC Logic state

5state<1>

4state<0>

3RFU

2RFU

1RFU

0RFU

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