MFRC522 datasheet(108/109 Pages) NXP

108 / 109 page

NXP Semiconductors

MFRC522

Contactless Reader IC

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: sales.addresses@www.nxp.com

Date of release: 22 May 2007

Document identifier: 112132

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

10.2.4 Address byte . . . . . . . . . . . . . . . . . . . . . . . 48

10.3

UART Interface . . . . . . . . . . . . . . . . . . . . . 48

10.3.1 Connection to a host . . . . . . . . . . . . . . . . . 48

10.3.2 Selection of the transfer speeds . . . . . . . . 49

10.3.3 Framing . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.4

I2C Bus Interface . . . . . . . . . . . . . . . . . . . 52

10.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

10.4.2 Data validity. . . . . . . . . . . . . . . . . . . . . . . . 53

10.4.3 START and STOP conditions . . . . . . . . . . 53

10.4.4 Byte format . . . . . . . . . . . . . . . . . . . . . . . . 54

10.4.5 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . 54

10.4.6 7-BIT ADDRESSING. . . . . . . . . . . . . . . . . 55

10.4.7 Register Write Access . . . . . . . . . . . . . . . 56

10.4.8 Register Read Access. . . . . . . . . . . . . . . . 57

10.4.9 HS mode . . . . . . . . . . . . . . . . . . . . . . . . . 58

10.4.10High Speed Transfer . . . . . . . . . . . . . . . . . 58

10.4.11 Serial Data transfer Format in HS mode . . 58

10.4.12Switching from F/S to HS mode and Vice Versa

10.4.13MFRC522 at Lower Speed modes . . . . . . 60

Analog Interface and Contactless UART. . 61

11.1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

11.2

TX Driver . . . . . . . . . . . . . . . . . . . . . . . . . 61

11.3

Serial Data Switch . . . . . . . . . . . . . . . . . . 63

11.4

MFIN/MFOUT interface support . . . . . . . . 63

11.5

CRC co-processor. . . . . . . . . . . . . . . . . . . 64

FIFO Buffer . . . . . . . . . . . . . . . . . . . . . . . . 65

12.1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 65

12.2

Accessing the FIFO Buffer . . . . . . . . . . . . 65

12.3

Controlling the FIFO-Buffer . . . . . . . . . . . . 65

12.4

Status Information about the FIFO-Buffer . 65

Timer Unit . . . . . . . . . . . . . . . . . . . . . . . . . 67

Interrupt Request System . . . . . . . . . . . . . 68

Oscillator Circuitry . . . . . . . . . . . . . . . . . . . 69

Power Reduction modes . . . . . . . . . . . . . . 70

16.1

Hard Power-down . . . . . . . . . . . . . . . . . . . 70

16.2

Soft Power-down . . . . . . . . . . . . . . . . . . . . 70

16.3

Transmitter Power-down . . . . . . . . . . . . . . 70

Reset and Oscillator Startup Time . . . . . . 71

17.1

Reset Timing Requirements . . . . . . . . . . . 71

17.2

Oscillator Startup Time . . . . . . . . . . . . . . . 71

MFRC522 Command Set . . . . . . . . . . . . . 72

18.1

General Description . . . . . . . . . . . . . . . . . 72

18.2

General Behavior . . . . . . . . . . . . . . . . . . . 72

18.3

MFRC522 Commands Overview . . . . . . . 72

18.3.1 MFRC522 Command Description . . . . . . . 73

18.3.1.1Idle Command . . . . . . . . . . . . . . . . . . . . . 73

18.3.1.2Mem Command . . . . . . . . . . . . . . . . . . . . 73

18.3.1.3Generate RandomID Command . . . . . . . 73

18.3.1.4CalcCRC Command. . . . . . . . . . . . . . . . . 73

18.3.1.5Transmit Command . . . . . . . . . . . . . . . . . 73

18.3.1.6NoCmdChange Command . . . . . . . . . . . 73

18.3.1.7Receive Command. . . . . . . . . . . . . . . . . . 74

18.3.1.8Transceive Command . . . . . . . . . . . . . . . 74

18.3.1.9MFAuthent Command . . . . . . . . . . . . . . . 74

18.3.1.10SoftReset Command . . . . . . . . . . . . . . . 75

Testsignals . . . . . . . . . . . . . . . . . . . . . . . . 76

19.1

Selftest . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

19.2

Test bus. . . . . . . . . . . . . . . . . . . . . . . . . . . 76

19.3

Testsignals at pin AUX . . . . . . . . . . . . . . . 77

19.3.1 Example: Output TestDAC 1 on AUX1 and

TestDAC 2 on AUX2 . . . . . . . . . . . . . . . . . 79

19.3.2 Example: Output Testsignal Corr1 on AUX1

and MinLevel on AUX2 . . . . . . . . . . . . . . . 79

19.3.3 Example: Output ADC channel I on AUX 1 and

ADC channel Q on AUX 2. . . . . . . . . . . . . 80

19.3.4 Example: Output RxActive on AUX 1 and

TxActive on AUX 2 . . . . . . . . . . . . . . . . . . 81

19.3.5 Example: Output Rx Data Stream on AUX 1

and AUX 2. . . . . . . . . . . . . . . . . . . . . . . . . 82

19.4

PRBS (Pseudo-Random Binary Sequence) 82

Limiting values . . . . . . . . . . . . . . . . . . . . . 83

Recommended operating conditions . . . . 83

Thermal characteristics. . . . . . . . . . . . . . . 83

Characteristics . . . . . . . . . . . . . . . . . . . . . 84

23.1

Input Pin Characteristics . . . . . . . . . . . . . . 84

23.1.1 Input Pin characteristics for pins EA, I2C and

NRESET . . . . . . . . . . . . . . . . . . . . . . . . . . 84

23.1.2 Input Pin characteristics for pin MFIN . . . . 84

23.1.3 Input/Output Pin characteristics for pins D1,

D2, D3, D4, D5, D6 and D7 . . . . . . . . . . . 84

23.1.4 Input Pin characteristics for pin SDA . . . . 84

23.1.5 Output Pin characteristics for Pin MFOUT 85

23.1.6 Output Pin characteristics for Pin IRQ . . . 85

23.1.7 Input Pin characteristics for Pin Rx . . . . . . 85

23.1.8 Input Pin characteristics for pin OSCIN . . 85

MFRC522 Datasheet(PDF) 108 Page - NXP Semiconductors

MFRC522 Datasheet(HTML) 108 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL