mfrc522 NXP Semiconductors, mfrc522 Datasheet - Page 8

• Manufacturer Part Number: mfrc522
• Description: Contactless Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
112132
Product data sheet
Table 3:
[1]
[2]
Symbol
TX1
TVDD
TX2
TVSS
AVDD
VMID
RX
AVSS
AUX1
AUX2
OSCIN
OSCOUT
IRQ
SDA
D1
D2
D3
D4
D5
D6
D7
EA
Connection of heat sink pad on package buttom side is not necessary. Optional connection to DVSS is
possible.
The pin functionality for the interfaces is explained in
Pin description
11
12
13
10, 14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Pin
Rev. 3.2 — 22 May 2007
Type
O
PWR
O
PWR
PWR
PWR
I
PWR
O
O
I
O
O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
…continued
Description
Transmitter 1: delivers the modulated 13.56 MHz energy
carrier
Transmitter Power Supply: supplies the output stage of TX1
and TX2
Transmitter 2: delivers the modulated 13.56 MHz energy
carrier
Transmitter Ground: supplies the output stage of TX1 and
TX2
Analog Power Supply
Internal Reference Voltage: This pin delivers the internal
reference voltage.
Receiver Input. Pin for the received RF signal.
Analog Ground
Auxiliary Outputs: These pins are used for testing.
Crystal Oscillator Input: input to the inverting amplifier of the
oscillator. This pin is also the input for an externally generated
clock (f
Crystal Oscillator Output: Output of the inverting amplifier of
the oscillator.
Interrupt Request: output to signal an interrupt event
Serial Data Line
Data Pins for different interfaces (test port, I
UART)
External Address: This Pin is used for coding I2C Address
[2]
osc
= 27.12 MHz).
Section 10 “DIGITAL
[2]
Interfaces”.
Contactless Reader IC
MFRC522
© NXP B.V. 2007. All rights reserved.
2
IC, SPI,
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[2]