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AS3900

Data Sheet - Contents

Contents

1 General Description.................................................................................................................................................................... 1

2 Key Features ............................................................................................................................................................................... 1

3 Applications ................................................................................................................................................................................ 1

4 Pin Assignment........................................................................................................................................................................... 5

4.1 Pin Description ......................................................................................................................................................................................... 5

5 Absolute Maximum Ratings....................................................................................................................................................... 7

6 Electrical Characteristics........................................................................................................................................................... 8

6.1 Electrical System Specification................................................................................................................................................................. 9

6.1.1 General......................................................................................................................................................................................... 9

6.1.2 Modulation Method ....................................................................................................................................................................... 9

6.1.3 Transmission Frame ..................................................................................................................................................................... 9

6.1.4 Receiver RX................................................................................................................................................................................ 10

6.1.5 Transmitter TX............................................................................................................................................................................ 11

6.1.6 Wakeup RX................................................................................................................................................................................. 11

6.1.7 RTC Crystal Oscillator 32.768 kHz ............................................................................................................................................. 11

6.1.8 XREF Crystal Oscillator 27 MHz................................................................................................................................................. 11

6.1.9 Battery Level Detector ................................................................................................................................................................ 12

6.1.10 Power-On-Reset Generator...................................................................................................................................................... 12

7 Typical Operating Characteristics........................................................................................................................................... 13

8 Detailed Description ................................................................................................................................................................. 14

8.1 Network Management ............................................................................................................................................................................ 15

8.1.1 Network....................................................................................................................................................................................... 15

8.1.2 Link Manager or Network Manager ............................................................................................................................................ 15

8.1.3 Principle of Communication ........................................................................................................................................................ 15

8.2 Operating Modes.................................................................................................................................................................................... 16

8.2.1 Power-down................................................................................................................................................................................ 16

8.2.2 Standby....................................................................................................................................................................................... 16

8.2.3 Sleep........................................................................................................................................................................................... 16

8.2.4 Pairing......................................................................................................................................................................................... 16

8.2.5 Wakeup....................................................................................................................................................................................... 16

8.2.6 Data Transmit/Receive ............................................................................................................................................................... 17

8.3 Link Manager.......................................................................................................................................................................................... 17

8.3.1 Establishing Network .................................................................................................................................................................. 17

8.3.2 Handling the Link Manager......................................................................................................................................................... 18

8.4 Digital Interface....................................................................................................................................................................................... 18

8.4.1 SDI Operation Mode Bits ............................................................................................................................................................ 19

8.4.2 Writing of Data to Addressable Registers (WRITE Mode).......................................................................................................... 19

8.4.3 Reading of Data from Addressable Registers (READ Mode) ..................................................................................................... 20

8.4.4 Send Single COMMAND byte..................................................................................................................................................... 21

8.4.5 Read Received Data................................................................................................................................................................... 22

8.4.6 Interrupt Interface Description .................................................................................................................................................... 22

8.4.7 Microcontroller Clock Interface ................................................................................................................................................... 24

8.5 Wakeup Procedure................................................................................................................................................................................. 25

8.5.1 Wakeup Receive Mode............................................................................................................................................................... 25

8.5.2 Wakeup Transmit Mode.............................................................................................................................................................. 25

8.6 Pairing .................................................................................................................................................................................................... 26