AXM0F343 Wireless System on Chip

onsemi’s AXM0F343 is a system on chip (SoC) for true single-chip wireless applications. The AXM0F343 contains onsemi’s narrowband AX5043 RF transceiver and a high-performance Arm Cortex-M0+ microcontroller (MCU) in a QFN40 package.

The AX5043 radio is extremely powerful and is software programmable. With a wide array of available modulation schemes, frequency range from 27 MHz to 1050 MHz, and data rates from 0.1 kbps to 125 kbps, nearly any Sub-GHz protocol, proprietary or standards-based, can be implemented.

The software programmability of the radio core makes it possible to share a common hardware design for products with different software loaded, making it easier for users to manage multiple SKUs. It is also possible to implement a multi-protocol solution using this device for powerful gateway implementations.

The integrated frequency synthesizer can generate any carrier frequency from 27 MHz to 1050 MHz. For frequencies below ~400 MHz an external inductor is used by the integrated VCO, but above ~400 MHz an integrated inductor can be used instead.

The AX5043 receiver is extremely robust and can achieve sensitivities as low as -137 dBm, while consuming less than 10 mA of current. For applications requiring antenna diversity, an integrated diversity controller is included and can automatically control an external antenna switch through a general purpose I/O (GPIO) pin. The receiver also has a wake on radio feature, reducing power consumption by allowing the MCU to sleep as long and as often as possible between radio events.

The AX5043 transmitter includes either a differential power amplifier that generates up to 16 dBm or a single-ended option for up to 13 dBm.

The high-performance Arm Cortex-M0+ runs at up to 40 MHz; between two variants, it has either 64 kB of Flash and 8 kB of RAM or 256 kB of Flash and 32 kB RAM. The MCU has two USART blocks, an SPI controller, and I²C interfaces. Rich timer options are systick timer, three 16-bit general purpose timers, a 32-bit tick timer, and a 32-bit watchdog timer. There are four capture and compare PWM blocks, a sigma-delta modulator, onboard hardware acceleration for AES, CRC, and TRNG, and 19 programmable GPIO.

In addition to the extremely powerful core, the AXM0F343 MCU also has powerful analog functionality. There is an integrated 12-bit SAR ADC capable of 1 Msps conversions with single-ended and fully differential modes for up to six channels. The MCU also contains two ultra-low-power comparators.

Features

• Ultra-low-power Arm Cortex-M0+ 40 MHz MCU with either 64 kB Flash / 8 KB RAM or 256 kB Flash / 32 kB RAM
• High-performance narrowband RF-transceiver, based on field-proven AX5043
• Ultra-low-power, high-performance device housed in a small, 5 mm x 7 mm, QFN40 package
• Widest array of shaped modulations supported (FSK, MSK, 4-FSK, GFSK, GMSK, AFSK, ASK, and FM), excellent receiver, and efficient transmitter with the highest link budget for the longest-range communication
• Ideal for a wide range of battery-operated applications
• Supply range: 2.1 V to 3.6 V
• High-performance 12-bit ADC, low power comparators
• 19 GPIO
• Extremely low standby current
• Receiver sensitivity of -137 dBm
• PHY support for many low data rate 802.15.4g SUN PHYs
• Flexible digital I/O to interface with sensors and other devices
• Longest range due to largest link budget, and can trade off ultra-long-range for lower Tx current consumption