MAX32672EVKIT
Overview
The MAX32672 evaluation kit (EV kit) provides a platform for evaluating the capabilities of the MAX32672 microcontroller, which is a small, high-reliability, ultra-low power, 32-bit microcontroller. The MAX32672 is a secure and cost-effective solution for motion/motor control, industrial sensors, and battery-powered medical devices and offers legacy designs an easy, cost-optimal upgrade path from 8-bit or 16-bit microcontrollers.
The Zephyr port is running on the MAX32672 MCU.
Hardware
MAX32672 MCU:
High-Efficiency Microcontroller for Low-Power High-Reliability Devices
Arm Cortex-M4 Processor with FPU up to 100MHz
1MB Dual-Bank Flash with Error Correction
200KB SRAM (160KB with ECC Enabled), Optionally Preserved in Lowest Power Modes
EEPROM Emulation on Flash
16KB Unified Cache with ECC
Resource Protection Unit (RPU) and MemoryProtection Unit (MPU)
Dual- or Single-Supply Operation, 1.7V to 3.6V
Wide Operating Temperature: -40°C to +105°C
Flexible Clocking Schemes
Internal High-Speed 100MHz Oscillator
Internal Low-Power 7.3728MHz and Ultra-Low-Power 80kHz Oscillators
16MHz–32MHz Oscillator, 32.768kHz Oscillator(External Crystal Required)
External Clock Input for CPU, LPUART, LPTMR
Power Management Maximizes Uptime for Battery Applications
59.8μA/MHz ACTIVE at 0.9V up to 12MHz(CoreMark®)
56.6μA/MHz ACTIVE at 1.1V up to 100MHz(While(1))
3.09μA Full Memory Retention Power in BACKUPMode at VDD = 1.8V
350nA Ultra-Low-Power RTC at
Wake from LPUART or LPTMR
Optimal Peripheral Mix Provides Platform Scalability
Up to 42 General-Purpose I/O Pins
Up to Three SPI Master/Slave (up to 50Mbps)
Up to Three 4-Wire UART
Up to Three I2C Master/Slave 3.4Mbps High Speed
Up to Four 32-Bit Timers (TMR)
Up to Two Low-Power 32-Bit Timers (LPTMR)
One I2S Master/Slave for Digital Audio Interface
12-Channel, 12-Bit, 1Msps SAR ADC with On-DieTemperature Sensor
Security and Integrity
Optional ECDSA-Based Cryptographic SecureBootloader in ROM
Secure Cryptographic Accelerator for Elliptic Curve
AES-128/192/256 Hardware Acceleration Engine
Benefits and Features of MAX32672EVKIT:
Selectable, On-Board, High-Precision Voltage Reference
128 x 128 (1.45in) Color TFT Display with SPI Interface
Breadboard-Compatible Headers
USB 2.0 Micro B-to-Serial UARTs
UART0 and LPUART0 Interface Is Selectable through On-Board Jumpers
All GPIOs Signals Accessed through 0.1in Headers
12 Analog Inputs Accessed through 0.1in Headers with Optional Filtering
10-Pin Arm® Cortex® SWD Connector
Board Power Provided by USB Port
On-Board, 3.3V LDO Regulator
Test Loops Provided to Supply Optional VCORE Power Externally
Individual Power Measurement on All IC Rails through Jumpers
Two General-Purpose LEDs and One General-Purpose Pushbutton Switch
Supported Features
Below interfaces are supported by Zephyr on MAX32672EVKIT.
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 |
PWM |
on-chip |
pwm |
Flash |
on-chip |
flash |
Connections and IOs
Name |
Name |
Settings |
Description |
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JP1 |
VREF |
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JP2 |
P0_22 |
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JP3 |
P0_23 |
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JP4 |
I2C0_SCL |
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JP5 |
I2C0_SDA |
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JP6 |
I2C1_SCL |
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JP7 |
I2C1_SDA |
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JP8 |
I2C2_SCL |
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JP9 |
I2C2_SDA |
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JP10 |
UART_RX |
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JP11 |
UART_TX |
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JP12 |
VDDA |
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JP13 |
VDD |
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JP14 |
VCORE |
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JP15 |
LDO DUT |
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Detailed Description of Hardware
Power Supply
The EV kit is powered by +5V, which is made available through VBUS on the Micro USB type-B connector CN1. The blue VBUS LED (DS1) and the green 3.3V LED will illuminate when the board is powered.
Single- or Dual-Supply Operation
The EV kit is configured for single-supply operation. For dual-supply operation, install a jumper on JP14 and connect an external supply to TP6 (VCORE_EXT) and ground. Refer to the MAX32672 data sheet for acceptable voltage values.
Current Monitoring
Two pin headers provide convenient current monitoring points for VDDA EN (JP12), VDD EN (JP13), and VCORE EN (JP14). JP14 is only used for current measurements when VCORE is supplied externally.
Low-Power Mode Current Measurements
To accurately achieve the low-power current values, the EV kit must be configured such that no outside influence (such as a pullup, external clock, or debugger connector) causes a current source or sink on that GPIO. For these measurements, the board will be needed to be configured as follows:
Remove jumpers JP2 through JP11.
Set SW2 to the DIS position and remove resistor R12.
Unplug the SWD connector.
Clocking
The MAX32672 clocking is provided by an external 16MHz crystal (Y1).
External Voltage Reference
The external voltage reference input VREF for the ADC can be sourced externally by a high-precision external reference source (the MAX6071). VREF (JP1) allows the external reference to be disconnected so that VREF can be sourced internally by VDDA.
UART Interface
The EV kit provides a USB-to-UART bridge chip (the FTDI FT230XS-R). This bridge eliminates the requirement for a physical RS-232 COM port. Instead, the IC’s UART access is through the Micro USB type-B connector (CN1). The USB-to-UART bridge can be connected to the IC’s UART0 or LPUART0 with jumpers JP10 (RX0) and JP11 (TX0). Virtual COM port drivers and guides for installing Windows® drivers are available on the FTDI Chip website.
Boot Loader
The boot loader is activated by the boot-load-enable slide switch (SW2). This pulls P0_10 low and, upon a power cycle or reset, the device will enter boot loader mode.
GPIO and Alternate Function Headers
GPIO and alternate function signals from the MAX32672 can be accessed through 0.1in-spaced headers J3 and J4.
Analog Headers
The 12 analog inputs can be accessed through 0.1inspaced headers JH1, JH2, and JH3.
I2C Pullups
The I2C ports can independently pulled up to V_AUX (3.3V default) through JP4 (I2C0_CL_PU) and JP5 (I2C0_DA_PU), JP6 (I2C1_CL_PU) and JP7 (I2C1_DA_PU), and JP8 (I2C2_CL_PU) and JP9 (I2C2_DA_PU).
Programming and Debugging
The IC can be reset by pushbutton SW1.
Programming and Debugging
Flashing
SWD debug can be accessed through an Arm Cortex 10-pin connector (J5). Logic levels are set to 3V3 by default, but they can be set to 1.8V if TP5 (VDD_VDDA_EXT) is supplied externally. Be sure to remove jumper JP15 (LDO_DUT_EN) to disconnect the 3.3V LDO if supplying VDD and VDDA externally.
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.
Note
This board uses OpenOCD as the default debug interface. You can also use
a Segger J-Link with Segger’s native tooling by overriding the runner,
appending --runner jlink to your west command(s). The J-Link should
be connected to the standard 2*5 pin debug connector (JH2) using an
appropriate adapter board and cable.
Debugging
Please refer to the Flashing section and run the west debug command
instead of west flash.