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AS3933
Datasheet - Contents
Contents
1 General Description .................................................................................................................................................................. 1
2 Key Features............................................................................................................................................................................. 1
3 Applications............................................................................................................................................................................... 1
4 Pin Assignments ....................................................................................................................................................................... 5
4.1 TSSOP-16 Package ............................................................................................................................................................................. 5
4.1.1 Pin Descriptions........................................................................................................................................................................... 5
4.2 QFN-16 Package.................................................................................................................................................................................. 6
4.2.1 Pin Descriptions........................................................................................................................................................................... 6
5 Absolute Maximum Ratings ...................................................................................................................................................... 7
6 Electrical Characteristics........................................................................................................................................................... 8
7 Typical Operating Characteristics ........................................................................................................................................... 11
8 Detailed Description................................................................................................................................................................ 12
8.1 Operating Modes ................................................................................................................................................................................ 13
8.1.1 Listening Mode .......................................................................................................................................................................... 14
8.1.2 Artificial Wake-up....................................................................................................................................................................... 15
8.1.3 Preamble Detection / Pattern Correlation .................................................................................................................................. 15
8.1.4 Data Receiving .......................................................................................................................................................................... 15
8.2 System and Block Specification ......................................................................................................................................................... 16
8.2.1 Register Table ........................................................................................................................................................................... 16
8.2.2 Register Table Description and Default Values ......................................................................................................................... 16
8.2.3 Serial Peripheral Interface (SPI) ................................................................................................................................................ 18
8.2.4 SDI Timing ................................................................................................................................................................................. 22
8.3 Channel Amplifier, Frequency Detector and RSSI ............................................................................................................................. 22
8.3.1 Frequency Detector / RSSI / Channel Selector ......................................................................................................................... 23
8.3.2 Antenna Damper........................................................................................................................................................................ 24
8.4 Demodulator / Data Slicer .................................................................................................................................................................. 25
8.5 Correlator............................................................................................................................................................................................ 27
8.5.1 Pattern: Bit and Symbol Definition in Manchester Code............................................................................................................ 27
8.6 Wake-up Protocol ............................................................................................................................................................................... 29
8.6.1 Wake-up Protocol: Frequency Detection Only........................................................................................................................... 30
8.6.2 Wake-up Protocol: Pattern Detection Enabled .......................................................................................................................... 30
8.6.3 Manchester Decoder and Clock Recovery ................................................................................................................................ 32
8.7 False Wake-up Register ..................................................................................................................................................................... 32
8.8 Clock Generator ................................................................................................................................................................................. 34
8.8.1 Crystal Oscillator........................................................................................................................................................................ 34
8.8.2 RC-Oscillator ............................................................................................................................................................................. 35
8.8.3 External Clock Source ............................................................................................................................................................... 36
8.9 Antenna Tuning .................................................................................................................................................................................. 36
8.10 Channel Selection in Scanning Mode and ON/OFF Mode ............................................................................................................... 37
9 Package Drawings and Markings ........................................................................................................................................... 38
10 Ordering Information............................................................................................................................................................. 41
