MFRC522 datasheet(52/96 Pages) NXP

52 / 96 page

MFRC522_33

Product data sheet

PUBLIC

Rev. 3 — 26 October 2009

112133

52 of 96

NXP Semiconductors

MFRC522

Contactless reader IC

9.3.2.12

Reserved register 1Bh

Functionality is reserved for future use.

9.3.2.13

MfTxReg register

Controls some MIFARE communication transmit parameters.

Table 73.

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

Bit

Symbol

reserved

Access

Table 74.

Reserved register bit descriptions

Bit

Symbol

Description

7 to 0

reserved

reserved for future use

Table 75.

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

Bit

Symbol

reserved

Access

Table 76.

Reserved register bit descriptions

Bit

Symbol

Description

7 to 0

reserved

reserved for future use

Table 77.

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

Bit

Symbol

reserved

TxWait[1:0]

Access

R/W

Table 78.

MfTxReg register bit descriptions

Bit

Symbol

Description

7 to 2

reserved

reserved for future use

1 to 0

TxWait

deﬁnes the additional response time

7 bits are added to the value of the register bit by default

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