MFRC522 datasheet(5/96 Pages) NXP

5 / 96 page

MFRC522_33

Product data sheet

PUBLIC

Rev. 3 — 26 October 2009

112133

5 of 96

NXP Semiconductors

MFRC522

Contactless reader IC

Pinning information

7.1 Pin description

Fig 3.

Pinning conﬁguration HVQFN32 (SOT617-1)

001aaj819

MFRC522

Transparent top view

MFIN

MFOUT

AVSS

NRSTPD

AUX1

PVSS

AUX2

DVSS

OSCIN

DVDD

OSCOUT

PVDD

IRQ

I2C

SDA/NSS/RX

Table 3.

Pin description

Symbol

Type[1] Description

I2C

I2C-bus enable input[2]

PVDD

pin power supply

DVDD

digital power supply

DVSS

digital ground[3]

PVSS

pin power supply ground

NRSTPD

reset and power-down input:

power-down: enabled when LOW; internal current sinks are switched off, the oscillator

is inhibited and the input pins are disconnected from the outside world

reset: enabled by a positive edge

MFIN

MIFARE signal input

MFOUT

MIFARE signal output

SVDD

MFIN and MFOUT pin power supply

TVSS

transmitter output stage 1 ground

TX1

transmitter 1 modulated 13.56 MHz energy carrier output

TVDD

transmitter power supply: supplies the output stage of transmitters 1 and 2

TX2

transmitter 2 modulated 13.56 MHz energy carrier output

TVSS

transmitter output stage 2 ground

AVDD

analog power supply

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