MFRC522_(2007) 데이터 시트보기 (PDF) - NXP Semiconductors.
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MFRC522_ Datasheet PDF : 109 Pages
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NXP Semiconductors
MFRC522
Contactless Reader IC
Table 3: Pin description …continued
Symbol
Pin Type Description
TX1
11
O
Transmitter 1: delivers the modulated 13.56 MHz energy
carrier
TVDD
12
PWR Transmitter Power Supply: supplies the output stage of TX1
and TX2
TX2
13
O
Transmitter 2: delivers the modulated 13.56 MHz energy
carrier
TVSS
10, 14
PWR Transmitter Ground: supplies the output stage of TX1 and
TX2
AVDD
15
PWR Analog Power Supply
VMID
16
PWR Internal Reference Voltage: This pin delivers the internal
reference voltage.
RX
17
I
Receiver Input. Pin for the received RF signal.
AVSS
18
PWR Analog Ground
AUX1
19
O
Auxiliary Outputs: These pins are used for testing.
AUX2
20
O
OSCIN
21
OSCOUT 22
I
Crystal Oscillator Input: input to the inverting amplifier of the
oscillator. This pin is also the input for an externally generated
clock (fosc = 27.12 MHz).
O
Crystal Oscillator Output: Output of the inverting amplifier of
the oscillator.
IRQ
23
O
Interrupt Request: output to signal an interrupt event
SDA
24
I
Serial Data Line[2]
D1
25
I/O
Data Pins for different interfaces (test port, I2IC, SPI,
D2
26
I/O
UART)[2]
D3
27
I/O
D4
28
I/O
D5
29
I/O
D6
30
I/O
D7
31
I/O
EA
32
I
External Address: This Pin is used for coding I2C Address[2]
[1] Connection of heat sink pad on package buttom side is not necessary. Optional connection to DVSS is
possible.
[2] The pin functionality for the interfaces is explained in Section 10 “DIGITAL Interfaces”.
112132
Product data sheet
Rev. 3.2 — 22 May 2007
© NXP B.V. 2007. All rights reserved.
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