Product data

MFRC631 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.3 — 4 February 2014
227433 5 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
7.1 Pin description
[1] This pin is used for connection of a buffer capacitor. Connection of a supply voltage might damage the device.
Table 3. Pin description
Pin Symbol Type Description
1 TDO O test data output for boundary scan interface
2 TDI I test data input boundary scan interface
3 TMS I test mode select boundary scan interface
4 TCK I test clock boundary scan interface
5 SIGIN I Contactless communication interface output.
6 SIGOUT O Contactless communication interface input.
7 DVDD PWR digital power supply buffer
[1]
8 VDD PWR power supply
9 AVDD PWR analog power supply buffer
[1]
10 AUX1 O auxiliary outputs: Pin is used for analog test signal
11 AUX2 O auxiliary outputs: Pin is used for analog test signal
12 RXP I receiver input pin for the received RF signal.
13 RXN I receiver input pin for the received RF signal.
14 VMID PWR internal receiver reference voltage
[1]
15 TX2 O transmitter 2: delivers the modulated 13.56 MHz carrier
16 TVSS PWR transmitter ground, supplies the output stage of TX1, TX2
17 TX1 O transmitter 1: delivers the modulated 13.56 MHz carrier
18 TVDD PWR transmitter voltage supply
19 XTAL1 I crystal oscillator input: Input to the inverting amplifier of the oscillator. This is pin is also the
input for an externally generated clock (fosc = 27,12 MHz)
20 XTAL2 O crystal oscillator output: output of the inverting amplifier of the oscillator
21 PDOWN I Power Down
22 CLKOUT O clock output
23 SCL O Serial Clock line
24 SDA I/O Serial Data Line
25 PVDD PWR pad power supply
26 IFSEL0 I host interface selection 0
27 IFSEL1 I host interface selection 1
28 IF0 I/O interface pin, multifunction pin: Can be assigned to host interface RS232, SPI, I
2
C, I
2
C-L
29 IF1 I/O interface pin, multifunction pin: Can be assigned to host interface SPI, I
2
C, I
2
C-L
30 IF2 I/O interface pin, multifunction pin: Can be assigned to host interface RS232, SPI, I
2
C, I
2
C-L
31 IF3 I/O interface pin, multifunction pin: Can be assigned to host interface RS232, SPI, I
2
C, I
2
C-L
32 IRQ O interrupt request: output to signal an interrupt event
33 VSS PWR ground and heatsink connection