SLWRB4253A

The SLWRB4253A from Silicon Labs is an EFR32 Flex Gecko 2.4GHz and 915MHz dual band radio board. The Flex Gecko SLWRB4253A radio board plugs into the wireless starter kit main board provided with the Flex Gecko starter kits to get access to display, buttons and additional features from expansion boards. With the supporting Simplicity Studio suite of tools, developers can take advantage of graphical wireless application development and visual energy profiling and optimization. The radio board can also be used as a reference design for matching networks of the RF interfaces. The board contains a Flex Gecko wireless system on chip 2.4GHz and 915MHz dual band and optimized for operation with 19dBm output power. For the 2.4GHz band with the on-board printed antenna and RF connector enables radiated and conducted testing. For the 915MHz band the on-board SMA connector enables conducted testing and attachment of external whip antenna for radiated tests.

• Wireless SoC EFR32FG12P433F1024GL125 ARM cortex M4 with FPU, 1024KB flash, 256KBRAM
• Touch slider
• Crystals for LFXO and HFXO is 32.768KHz and 38.4MHz
• Radio board supports dual-band operation with its integrated sub-GHz ISM & 2.4GHz band transceivers

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Embedded Design & Development