"SiWx917" Wi-Fi 6 ultra-low current application processor, ideal for battery-powered IoT devices

Silicon Labs' SiWx917 is an ultra-low current application processor with Wi-Fi 6/BLE 5.4, ideal for battery-powered IoT devices. With a rich set of peripherals and high security performance, the SiWx917 supports a wide range of IoT use cases. Its versatile power state management minimizes power consumption while ensuring stable Wi-Fi 6 connections.

This time, we will introduce Silicon Labs' SiWx917, which will contribute to the expansion of battery-powered IoT devices.

Feature 1: Ultra-low power consumption achieved through synergy between various power states and Wi-Fi 6

Feature 2: Various peripherals that operate even during sleep

Feature 3: Memory configuration suitable for various applications

Feature 4: Software configuration according to use cases

The specs of SiWx917Yare here

Silicon Labs' Wi-Fi Power Estimator

Easy Wifi Just enter the conditions of use and SiWx917 of Current consumption and Battery life This can be used to compare the current consumption of devices you are currently using or to estimate the current consumption of devices you are considering.

Please use the simple power consumption estimation tool here.

Wi-Fi Power Estimator

The tool's user guide is here:

Configuring the Wi-Fi Power Estimator Tool

Feature 1: Ultra-low power consumption achieved through synergy between various power states and Wi-Fi 6

The SiWx917 features a dual-core ARM® Cortex® M4 Processor that runs applications and a Network Wireless Processor (NWP) that runs the wireless stack.

NWP sends and receives packets through intermittent operation, allowing it to periodically go to sleep while maintaining a Wi-Fi connection.

The M4 Processor also has a variety of power states, and by combining the power states of the M4 Processor and NWP, it is possible to run applications at the minimum power consumption required at all times.

Additionally, by combining the Wi-Fi 6​ ​TWT function, it becomes possible to set the optimal sleep time for your application.

This allows for extended sleep periods while maintaining a Wi-Fi connection, significantly reducing average power consumption.

Silicon Labs' expertise in ultra-low power consumption is fully utilized, contributing to longer battery life.

* Conditions: Wi-Fi 6 TWT (auto setting), TWT Rx latency 60 seconds, wake-up time 8 ms, WLAN keep-alive every 60 seconds, no TCP keep-alive, 352kB SRAM retention, does not include MCU application operation.

Feature 2: Various peripherals that operate even during sleep

The SiWx917 has a variety of peripherals (I2C, UART, SPI, ADC, GPIO, etc.) and can be connected to a variety of sensors.

These can also be used when the M4 Processor is stopped, allowing sensor signal acquisition with low power consumption.

During the sensor signal processing phase, the M4 Processor transitions from sleep mode to high-performance mode at high speed.

It can function as a sensor hub, quickly processing signals received from various sensors, wirelessly transmitting the processed information, and then going back into sleep mode.

It is possible to acquire and process sensor signals, which are essential for IoT devices, with the minimum amount of power consumption.

Feature 3: Memory configuration suitable for various applications

The SiWx917 can be implemented with up to 672kB of RAM and up to 16MB of Flash and PSRAM.

The following points will free users from worries about memory capacity:

- Support for complex applications

・Support for applications such as Matter whose specifications are expected to evolve

・Necessity of external flash for OTA updates

Feature 4: Software configuration according to use cases

Depending on the processing power and configuration required for the application, the SiWx917 operating mode can be selected from the following three types.

- SOC (System on Chip) mode: No external host is required; the entire wireless, network and application stack runs on a single chip.

- NCP (Network Co-Processor) mode: Executes the wireless and network stack under the command of an external host.

・RCP (Radio Co-Processor) mode: Runs only the radio stack. The upper layers of the radio and applications run on an external host.

SiWx917Y Specification Table

Silicon Labs release information

Related Information

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