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STM32WB55CC Datasheet(PDF) 23 Page - STMicroelectronics |
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STM32WB55CC Datasheet(HTML) 23 Page - STMicroelectronics |
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23 / 165 page  DS11929 Rev 3 23/165 STM32WB55xx Functional overview 69 3.6.3 802.15.4 general description The STM32WB55xx embed a dedicated 802.15.4 Hardware MAC • Support for 802.15.4 release 2011 • Advanced MAC frame filtering; hardwired firewall: Programmable filters based on source/destination addresses, frame version, security enabled, frame type • 256-byte RX FIFO; Up to 8 frames capacity, additional frame information (timing, mean RSSI,LQI) • 128-byte TX FIFO with retention – Content not lost, retransmissions possible under CPU2 control • Automatic frame Acknowledgment, with programmable delay • Advanced channel access features – Full CSMA-CA support – Superframe timer – Beaconing support (require LSE), – Flexible TX control with programmable delay • Configuration registers with retention available down to Standby mode for software/auto-restore • Autonomous Sniffer, Wakeup based on timer or CPU2 request • Automatic frame transmission/reception/sleep periods, Interrupt to the CPU2 on particular events 3.6.4 RF pin description The RF block contains dedicated pins, listed in Table 4. : 3.6.5 Typical RF application schematic The schematic in Figure 3 and the external components listed in Table 4 are purely indicative. For more details refer to the “Reference design” provided in separate documents. Table 4. RF pin list Name Type Description RF1 I/O RF Input/output, must be connected to the antenna through a low pass matching network OSC_OUT 32 MHz main oscillator, also used as HSE source OSC_IN EXT_PA_TX External PA transmit control VDDRF VDD Dedicated supply, must be connected to VDD VSSRF(1) VSS To be connected to GND 1. On packages with exposed pad, this pad must be connected to GND plane for correct RF operation. |
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