MFRC522 datasheet(32/109 Pages) NXP

32 / 109 page

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Product data sheet

Rev. 3.2 — 22 May 2007

32 of 109

NXP Semiconductors

MFRC522

Contactless Reader IC

9.2.2.14

MfRxReg

9.2.2.15

Reserved

Functionality is reserved for further use.

9.2.2.16

SerialSpeedReg

Selects the speed of the serial UART interface.

Table 65:

MfRxReg register (address 1Dh); reset value: 00h

Bit

Symbol

Parity Disable

Access

Rights

RFU

r/w

RFU

Table 66:

Description of ManualRCVReg bits

Bit

Symbol

Description

7 to 5

Reserved for future use.

Parity Disable

If this bit is set to logic 1, the generation of the Parity bit for

transmission and the Parity-Check for receiving is switched off. The

received Parity bit is handled like a data bit.

3 to 0

Reserved for future use.

Table 67:

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

Bit

Symbol

Access

Rights

RFU

Table 68:

Description of Reserved register bits

Bit

Symbol

Description

7 to 0

Reserved for future use.

Table 69:

SerialSpeedReg register (address 1Fh); reset value: EBh

Bit

Symbol

BR_T0

BR_T1

Access

Rights

r/w

Table 70:

Description of SerialSpeedReg bits

Bit

Symbol

Description

7 to 5

BR_T0

Factor BR_T0 to adjust the transfer speed, for description see Section

10.3.2 “Selection of the transfer speeds”.

4 to 0

BR_T1

Factor BR_T1 to adjust the transfer speed, for description see Section

10.3.2 “Selection of the transfer speeds”.

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