RC522 datasheet(31/109 Pages) NXP

31 / 109 page

112132

Product data sheet

Rev. 3.2 — 22 May 2007

31 of 109

NXP Semiconductors

MFRC522

Contactless Reader IC

9.2.2.11

Reserved

Functionality is reserved for further use.

9.2.2.12

Reserved

Functionality is reserved for further use.

9.2.2.13

MfTxReg

Controls some MIFARE® communication transmit parameters

Table 59:

Reserved register (address 1Ah); reset value: 00h

Bit

Symbol

Access

Rights

RFU

Table 60:

Description of Reserved register bits

Bit

Symbol

Description

7 to 0

Reserved for future use.

Table 61:

Reserved register (address 1Bh); reset value: 00h

Bit

Symbol

Access

Rights

RFU

Table 62:

Description of Reserved register bits

Bit

Symbol

Description

7 to 0

Reserved for future use.

Table 63:

MfTxReg register (address 1Ch); reset value: 62h

Bit

Symbol

TxWait

Access

Rights

RFU

r/w

Table 64:

Description of MifNFCReg bits

Bit

Symbol

Description

7 to 2

Reserved for future use.

1 to 0

TxWait

These bits define the additional response time. Per default 7 bits are

added to the value of the register bit.

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