S2-LP datasheet(7/90 Pages) STMICROELECTRONICS

7 / 90 page

S2-LP

List of figures

DocID029944 Rev 1

7/90

List of figures

Figure 1: Simplified S2-LP block diagram.................................................................................................10

Figure 2: Suggested application diagram (embedded SMPS used) ........................................................11

Figure 3: Suggested application diagram (embedded SMPS not used) ..................................................12

Figure 4: Pin diagram, 4 mm x 4 mm QFN24 package ............................................................................13

Figure 5: Power on reset timing and limits................................................................................................28

Figure 6: Direct polar mode ......................................................................................................................35

Figure 7: Output power ramping configuration .........................................................................................44

Figure 8: Threshold in FIFO......................................................................................................................45

Figure 9: State diagram ............................................................................................................................48

Figure 10: data whitening scheme............................................................................................................59

Figure 11: data whitening scheme 802.15.4g...........................................................................................60

Figure 12: Automatic retransmission scenario .........................................................................................63

Figure 13: Common RX operation ............................................................................................................64

Figure 14: LDC RX operation ...................................................................................................................64

Figure 15: LDC in TX with auto-ack..........................................................................................................66

Figure 16: LDC in RX with auto-ack .........................................................................................................66

Figure 17: Fast RX termination mode with LDC .......................................................................................67

Figure 18: Fast Rx termination: CS detection...........................................................................................67

Figure 19: Flowchart of the S2-LP CSMA procedure ...............................................................................68

Figure 20: CSMA if channel is free (timeline) ...........................................................................................69

Figure 21: CSMA with persistent mode if channel is busy (timeline) .......................................................70

Figure 22: CSMA with non-persistent mode if channel is busy (timeline) ................................................70

Figure 23: CSMA with non-persistent mode if channel becomes free (timeline)......................................70

Figure 24: SPI write sequence..................................................................................................................71

Figure 25: SPI read sequence ..................................................................................................................72

Figure 26: SPI command sequence .........................................................................................................72

Figure 27: QFN24L (4x4 mm) package outline ........................................................................................87

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