ST25R200 datasheet(81/88 Pages) STMICROELECTRONICS

81 / 88 page

Contents

Description .......................................................................3

Functional overview ...............................................................4

2.1

Block diagram ................................................................. 4

2.1.1

Transmitter ............................................................. 4

2.1.2

Receiver ............................................................... 5

2.1.3

Quartz crystal oscillator.................................................... 5

2.1.4

Power supply regulators ................................................... 5

2.1.5

POR and bias ........................................................... 5

2.1.6

RC oscillator and wake-up timer ............................................. 5

2.1.7

Tx coding .............................................................. 5

2.1.8

Rx framing ............................................................. 5

2.1.9

Control logic ............................................................ 5

2.1.10

FIFO .................................................................. 5

2.1.11

SPI ................................................................... 5

Pin and signal description .........................................................6

Device description.................................................................8

4.1

System diagram ............................................................... 8

Application information ...........................................................11

5.1

Operating modes.............................................................. 11

5.2

Power-on sequence ........................................................... 12

5.3

Supply system ................................................................ 13

5.4

Power-down support block...................................................... 14

5.5

Automatic adjust regulator circuit ................................................ 14

5.6

Crystal oscillator .............................................................. 15

5.7

RC oscillator.................................................................. 15

5.8

Communication with an external host............................................. 15

5.8.1

Interrupt interface ....................................................... 15

5.8.2

Serial peripheral interface (SPI) ............................................ 15

5.8.3

FIFO block ............................................................ 19

5.9

Timers....................................................................... 20

5.10

Reader operation.............................................................. 21

5.10.1

ISO 14443A/NFC-A short frames ........................................... 22

5.10.2

Bit-oriented anticollision .................................................. 22

5.10.3

EMD handling .......................................................... 23

5.11

Overshoot/undershoot protection ................................................ 23

ST25R200

Contents

DS13658 - Rev 2

page 81/88

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