ST25R3910 datasheet(37/65 Pages) STMICROELECTRONICS

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ST25R3910

1.3.1

ISO Mode Definition Register

Address: 00h

Type: RW

Table 8. ISO Mode Definition Register(1)

Bit

Name

Default

Function

Comments

7nfc(2)

1: NFCIP-1

0: ISO-14443

Enables NFCIP-1,

106 kbps active communication mode

b_a

1: ISO-14443B

0: ISO-14443A

Applicable if nfc = 0

5tx_rate2

tx_rate2

tx_rate1

tx_rate0

Bit rate

Select ISO-14443 data rate for

transmit. Applicable if nfc = 0

tx_rate1

000

106 kbps

3tx_rate0

001

212 kbps

010

424 kbps

011

848 kbps

RFU

2rx_rate2

rx_rate2

rx_rate1

rx_rate0

Bit rate

Select ISO-14443 data rate for

receive. Applicable if nfc = 0

rx_rate1

106 kbps

0rx_rate0

001

212 kbps

010

424 kbps

011

848 kbps

RFU

1. Default setting takes place at power-up and after Set Default command.

2. If nfc=1, both transmit and receive data rates are set to 106 kbps independently from TX and RX setting.

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