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UM1759 Datasheet(PDF) 19 Page - STMicroelectronics |
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UM1759 Datasheet(HTML) 19 Page - STMicroelectronics |
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19 / 50 page  DocID026279 Rev 1 19/50 UM1759 Hardware description 50 Figure 14. STEVAL-IKR001Vx (RF motherboard) 3.4.2 STEVAL-IKR001Vx (RF module) The RF module includes 5 different possible BOM lists, on the same layout PCB. Each one optimized for different RF band as follow: • 169 MHz • 315 MHz • 433 MHz • 868 MHz • 915 MHz The band indication is reported with a dummy resistor on the board, in A Figure 15. A SMA connector on the RF module, in B Figure 15, allows connection with RF instruments as spectrum analyzer and signal generator to the SPIRIT1 by RF cable or also connect an antenna as the one included in the demo kit. The board is powered through the RF daughterboard connector, in D Figure 15, by the RF motherboard and communicates through this connector by SPI and some GPIOs with the microcontroller. The Vcc_RF pin of the RF daughterboard connector is linked to the Vbat of the SPIRIT1 through a jumper that can be also removed to measure the current consumption, in C Figure 15. |
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