ST25R95 datasheet(56/61 Pages) STMICROELECTRONICS

56 / 61 page

Contents

Description ........................................................................2

1.1

Block diagram ................................................................. 2

1.2

Clock management ............................................................. 3

1.3

Power supply .................................................................. 3

1.4

List of terms ................................................................... 3

Pin and signal descriptions ........................................................4

Power management and operating modes..........................................6

3.1

Operating modes............................................................... 6

3.2

Startup sequence .............................................................. 7

Communication protocols .........................................................9

4.1

Serial peripheral interface (SPI) .................................................. 9

4.1.1

Polling mode ............................................................ 9

4.1.2

Interrupt mode.......................................................... 10

4.2

Error codes .................................................................. 11

4.3

Support of long frames ......................................................... 12

Commands .......................................................................13

5.1

Command format.............................................................. 13

5.2

List of commands ............................................................. 13

5.3

IDN command (0x01) description ................................................ 14

5.4

Protocol select command (0x02) description ....................................... 14

5.5

Pollfield command (0x03) description............................................. 19

5.6

Send receive (SendRecv) command (0x04) description ............................. 20

5.7

Listen command (0x05) description .............................................. 25

5.8

Send command (0x06) description ............................................... 26

5.9

Idle command (0x07) description ................................................ 28

5.9.1

Idle command parameters................................................. 29

5.9.2

Using LFO frequency setting to reduce power consumption ....................... 32

5.9.3

Optimizing wake-up conditions ............................................. 32

5.9.4

Using various techniques to return to ready state ............................... 32

ST25R95

Contents

DS12807 - Rev 4

page 56/61

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