MAX32680EVKIT

Overview

The MAX32680 evaluation kit (EV kit) provides a platform for evaluation capabilities of the MAX32680 microcontroller, which is an advanced system-on-chip (SoC) designed for industrial and medical sensors. Power regulation and management is provided by a single-inductor multiple-output (SIMO) buck regulator system and contains the latest generation Bluetooth® 5.2 Low Energy (LE) radio.

The Zephyr port is running on the MAX32680 MCU.

Hardware

• MAX32680 MCU:

  • Ultra-Low-Power Wireless Microcontroller

    • Internal 100MHz Oscillator

    • 512KB Flash and 128KB SRAM, Optional ECC on One 32KB SRAM Bank

  • Bluetooth 5.2 LE Radio

    • Dedicated, Ultra-Low-Power, 32-Bit RISC-VCoprocessor to Offload

    Timing-Critical Bluetooth Processing

    • Fully Open-Source Bluetooth 5.2 Stack Available

    • Supports AoA, AoD, LE Audio, and Mesh

    • High-Throughput (2Mbps) Mode•Long-Range (125kbps and 500kbps) Modes

    • Rx Sensitivity: -97.5dBm; Tx Power: +4.5dBm

    • Single-Ended Antenna Connection (50Ω)

  • Smart Integration Reduces BOM, Cost, and PCB Size

    • Two 16-Bit to 24-Bit Sigma-Delta ADCs

    • 12 Channels, Assignable to Either ADC

    • Flexible Resolution and Sample Rates

    • 24-Bits at 0.4ksps, 16-Bits at 4ksps

    • Four External Input, 10-Bit Sigma-Delta ADC 7.8ksps

    • 12-Bit DAC

    • On-Die Temperature Sensor

    • Digital Peripherals: Two SPI, Two I2C, up to FourUART, and up to 36 GPIOs

    • Timers: Six 32-Bit Timers, Two Watchdog Timers,Two Pulse Trains, 1-Wire® Master

  • Power Management Maximizes Battery Life

    • 2.0V to 3.6V Supply Voltage Range

    • Integrated SIMO Power Regulator

    • Dynamic Voltage Scaling (DVS)

    • 23.8μA/MHz ACTIVE Mode Current at 3.0VCoremark®

    • 4.4μA at 3.0V Retention Current for 32KB SRAM

    • Selectable SRAM Retention in Low-Power Modes

  • Robust Security and Reliability

    • TRNG

    • Secure Nonvolatile Key Storage and AES-128/192/256

    • Secure Boot to Protect IP/Firmware

    • Wide, -40°C to +85°C Operating Temperature

• External devices connected to the MAX32680 EVKIT:

  • SMA Connector for Attaching an External Bluetooth Antenna

  • 128 x 128 (1.45in) Color TFT Display with SPI Interface

  • Two Selectable On-Board, High-Precision Voltage References

  • USB 2.0 Micro B to Serial UARTs

  • UART1 and LPUART0 Interface is Selectable Through On-Board Jumpers

  • All GPIOs Signals Accessed Through 0.1in Headers

  • Access to Four Analog Inputs Through SMA Connectors Configured as Differential

  • Access to Eight Analog Inputs Through 0.1in Headers Configured as Single-End

  • Optional Discrete Filter for the Twelve Analog Inputs

  • DAC Accessed Through SMA Connector or Test Point

  • 10-Pin SWD Connector

  • 10-Pin RV JTAG Connector

  • Board Power Provided by USB Port

  • On-Board 3.3V LDO Regulator to Power MAX32680 Internal SIMO

  • Test Loops Provided to Supply Optional VCORE Power Externally

  • Individual Power Measurement on All IC Rails Through Jumpers

  • Two General Purpose LEDs and Two General Purpose Pushbutton Switches

Supported Features

Below interfaces are supported by Zephyr on MAX32680EVKIT.

Interface	Controller	Driver/Component
NVIC	on-chip	nested vector interrupt controller
SYSTICK	on-chip	systick
CLOCK	on-chip	clock and reset control
GPIO	on-chip	gpio
UART	on-chip	serial
TRNG	on-chip	entropy
I2C	on-chip	i2c
DMA	on-chip	dma controller
Watchdog	on-chip	watchdog
SPI	on-chip	spi
ADC	on-chip	adc
Timer	on-chip	counter

Connections and IOs

Name	Name	Settings	Description
JP1	VREGI	Open Closed	Disconnects 3.3V power from the MAX32680 SIMO. Connects 3.3V power to the MAX32680 SIMO.
JP2	REF0P	2-1 2-3	Connects the external high-precision voltage refernce to REF0P. Connects the internal voltage refernce to REF0P.
JP3	REF0N	Open Closed	Disconnects REF0N from ground. Connects REF0N to ground.
JP4	VDDIO_AUX	Open Closed	Disconnects VDDIO_AUX from pull-ups and reference voltages. Connects VDDIO_AUX to pull-ups and reference voltages.
JP5	VDDIOH	Open Closed	Connects VREGO_A to VDDIOH. Connects the 3.3V from the estrenal LDO to VDDIOH.
JP6	REF1P	2-1 2-3	Connects the external high-precision voltage refernce to REF1P. Connects the internal voltage refernce to REF1P.
JP7	REF1N	Open Closed	Disconnects REF1N from ground. Connects REF1N to ground.
JP8	I2C0_SDA I2C0_SCL	2-1 2-3	Connects I2C0 pullups to VDDIO_AUX (1.8V). Connects I2C0 pullups to 3.3V.
JP9	I2C1_SDA I2C1_SCL	2-1 2-3	Connects I2C1 pullups to VDDIO_AUX (1.8V). Connects I2C1 pullups to 3.3V.
JP10	P0_24	Open Closed	Disconnects red LED D1 from P0_24. Connects red LED D1 to P0_24.
JP11	P0_25	Open Closed	Disconnects green LED D2 from P0_25. Connects green LED D2 to P0_25.
JP12	FSK_IN	Open Closed	Disconnects FSK_IN from HART analog circuitry. Connects FSK_IN to HART analog circuitry.
JP13	RCV_FSK	Open Closed	Disconnects RCV_FSK from CC LOOP. Connects RCV_FSK to CC LOOP.
JP14	FSK_OUT	Open Closed	Disconnects FSK_OUT from HART analog circuitry. Connects FSK_OUT to HART analog circuitry.
JP15	RCV_FSK	Open Closed	Disconnects RCV_FSK from XFMR LOOP. Connects RCV_FSK to XFMR LOOP.
JP16	RLOAD	Open Closed	Disconnects 249 ohm resistor shunt from CC LOOP. Connects 249 ohm resistor shunt to CC LOOP.
JP17	FSK AMP GAIN	Open Closed	Enables FSK variable amp gain. Disables FSK variable amp gain.
JP18	AMP BYPASS	2-1 2-3	Enables FSK amp. Bypasses FSK amp.
JP19	FSK AMP GAIN	Open Closed	Enables FSK fixed amp gain. Disables FSK fixed amp gain.
JP20	HART_RTS	Open Closed	Enables HART_RTS optical transceiver. Bypasses HART_RTS optical transceiver.
JP21	RLOAD	Open Closed	Disconnects 249 ohm resistor shunt from XFMR LOOP. Connects 249 ohm resistor shunt to XFMR LOOP.
JP22	UART0_RX	2-1 2-3	Disconnects the USB - serial bridge from UART1_RX (P0.12). Connects the USB - serial bridge to LPUART_RX (P2.6).
JP23	UART0_TX	2-1 2-3	Disonnects the USB - serial bridge from UART1_TX (P0.13). Connects the USB - serial bridge to LPUART_TX (P2.7).
JP24	HART_IN HART_IN HART_OUT HART_OUT HART_RTS HART_RTS HART_OCD HART_OCD	Open 1-2 Open 2-3 Open 3-4 Open 4-5	Disconnects TX of USB - serial bridge from HART_IN (P0.1) Connects TX of USB - serial bridge to HART_IN (P0.1). Disconnects RX of USB - serial bridge from HART_OUT (P0.0). Connects RX of USB - serial bridge to HART_OUT (P0.0). Disconnects RTS of USB - serial bridge from HART_RTS (P0.3). Connects TX of USB - serial bridge to HART_RTS (P0.3). Disconnects RTS of USB - serial bridge from HART_OCD (P0.2). Connects TX of USB - serial bridge to HART_OCD (P0.2).
JP25	RSTN	Open Close	Disconnects DUT_3V3_RSTN from RSTN. Connects DUT_3V3_RSTN to RSTN.

Programming and Debugging

Flashing

The MAX32680 MCU can be flashed by connecting an external debug probe to the SWD port. SWD debug can be accessed through the Cortex 10-pin connector, JH10. Logic levels are set to 1.8V (VDDIO_AUX).

Once the debug probe is connected to your host computer, then you can simply run the west flash command to write a firmware image into flash.

Debugging

Please refer to the Flashing section and run the west debug command instead of west flash.

References

• MAX32680EVKIT web page