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The MAX32670-LR-ARDZ base board features the MAX32670 high-reliability, ultralow power microcontroller based on Arm Cortex-M4 processor, and the LR1110 long range RF transceiver module. The integrated RF transceiver supports a frequency range from 800 MHz up to 960 MHz, making it suitable for high-performance flexible platforms that wirelessly transmit encrypted data at long-range; enabling a wide range of IoT applications using ADI sensing solutions.
This solution also utilizes Semtech’s Long Range Cloud™ Geolocation capabilities to significantly reduce power consumption by determining asset location in a cloud-based solver. Due to its low power consumption, this module is ideal for devices running on small-sized batteries The on-board MAX32670 Arm Cortex®-M4 32-bit microcontroller provides the platform with complete capability to run entire RF stacks and user applications.
MCU |
---|
Arm Cortex-M4 Core with FPU up to 100 MHz |
384 kB Flash Memory with Error Correction |
160 kB SRAM (128 KB with ECC Enabled), optionally preserved in lowest power modes |
Compatible RTC resolution for long range radio application for protocol timeout management |
Security |
Available Secure Boot |
Support cryptographic algorithms, including AES-128/192/256 |
Power |
Ultralow Power Real Time Clock with Integrated Power Switch |
With 300 nA power consumption during sleep mode |
Multi-Purpose Radio Front-End Targeting Geolocation Purposes |
GNSS (GPS/BeiDou) low-power scanning |
802.11b/g/n Wi-Fi ultralow power passive scanning |
Long Range Radio |
Support FSK, GFSK, MSK, GMSK, and Long Range FHSS modulations |
Power Output: +15 dBm transmit peak power |
Programmable bit rate up to 62.5 kbps and 300 kbps |
Support sub-GHz ISM bands from 800 MHz to 960 MHz |
High sensitivity: down to -148 dBm |
In order to use this base board, all hardware settings such as the hardware peripheral connections, jumpers and UART switch configurations, power configurations, connectivity options, and the USB connectors and programming connections are provided in this page. Links to the schematics and the layout files are also available below.
The following standard connectors are provided on the base board for customer to use with external add-on modules:
Connector Name | Function |
---|---|
DC Power Connector Header | Input range from +4 V to +6 V DC supply voltage |
Battery Holder | Battery holder for CR123A |
Cortex SWD Header | Used for flash programming and debug interface; also, provides a virtual serial port connection to MAX32670 microcontroller |
PMOD_SPI | 12-pin SPI PMOD connector |
PMOD_I2C | 8-pin I2C PMOD connector |
ESP32 Connector | ESP32 Devkit V1 connector |
Arduino Connectors | Arduino Uno Rev3 compatible connectors |
The pin map for the MAX32670 MCU is described in the table and its schematic diagram below.
Net Name | Pin | Name | |
UART | |||
UART0A_RX_32670 | 20 | P0.8 | P0.8/UART0A_RX/I2S0_SDO/TMR0B_I |
UART0A_TX_32670 | 21 | P0.9 | P0.9/UART0A_TX/I2S0_WS/TMR0B_O |
UART0A_CTS_32670 | 22 | P0.10 | P0.10/UART0A_CTS/I2S0_SCK/TMR1B_I/DIV_CLK_OUTB |
UART0A_RTS_32670 | 23 | P0.11 | P0.11/UART0A_RTS/I2S0_SDI/TMR1B_O |
UART1A_RX_32670 | 17 | P0.28 | P0.28/UART1A_RX/TMR2D_I |
UART1A_TX_32670 | 18 | P0.29 | P0.29/UART1A_TX/TMR2D_O |
UART1A_CTS_32670 | 19 | P0.30 | P0.30/UART1A_CTS/TMR3D_I |
SPI | |||
SPI0_MISO_32670 | 6 | P0.2 | P0.2/SPI0_MISO/UART1B_RX/TMR1A_I |
SPI0_MOSI_32670 | 7 | P0.3 | P0.3/SPI0_MOSI/UART1B_TX/TMR1A_O |
SPI0_SCK_32670 | 8 | P0.4 | P0.4/SPI0_SCK/UART1B_CTS/TMR2A_I |
SPI0_SS0_32670 | 9 | P0.5 | P0.5/SPI0_SS0/UART1B_RTS/TMR2A_O/DIV_CLK_OUTA |
SPI1_MISO_32670 | 26 | P0.14 | P0.14/SPI1_MISO/UART2B_RX/TMR3B_I |
SPI1_MOSI_32670 | 27 | P0.15 | P0.15/SPI1_MOSI/UART2B_TX/TMR3B_O |
SPI1_SCK_32670 | 28 | P0.16 | P0.16/SPI1_SCK/UART2B_CTS/TMR0C_I |
SPI1_SS0_32670 | 29 | P0.17 | P0.17/SPI1_SS0/UART2B_RTS/TMR0C_O |
I2C | |||
I2C0_SCL_32670 | 10 | P0.6 | P0.6/I2C0_SCL/LPTMR0_I/TMR3A_I |
I2C0_SDA_32670 | 11 | P0.7 | P0.7/I2C0_SDA/LPTMR0_O/TMR3A_O |
I2C1_SCL_32670 | 24 | P0.12 | P0.12/I2C1_SCL/EXT_CLK2/TMR2B_I/EXT_CLK1 |
I2C1_SDA_32670 | 25 | P0.13 | P0.13/I2C1_SDA/32KCAL/TMR2B_O/SPI1_SS0 |
I2C2_SCL_32670 | 30 | P0.18 | P0.18/I2C2_SCL/TMR1C_I |
I2C2_SDA_32670 | 31 | P0.19 | P0.19/I2C2_SDA/TMR1C_O |
JTAG | |||
SWDIO_32670 | 4 | P0.0 | P0.0/SWDIO/TMR0A_I |
SWDCLK_32670 | 5 | P0.1 | P0.1/SWDCLK/TMR0A_O |
SWDCLKB_32670 | 1 | P0.20 | P0.20/CM4_RX/TMR2C_I/SWDCLKB |
SWDIOB_32670 | 3 | P0.22 | P0.22/LPTMR1_I/TMR3C_I/SWDIOB |
GPIO | |||
P0_21_32670 | 2 | P0.21 | P0.21/CM4_TX/TMR2C_O |
P0_23_32670 | 12 | P0.23 | P0.23/LPTMR1_O/TMR3C_O |
P0_24_32670 | 13 | P0.24 | P0.24/LPUART0_CTS/UART0B_RX/TMR0D_I |
P0_25_32670 | 14 | P0.25 | P0.25/LPUART0_RTS/UART0B_TX/TMR0D_O |
P0_26_32670 | 15 | P0.26 | P0.26/LPUART0_RX/UART0B_CTS/TMR1D_I |
P0_27_32670 | 16 | P0.27 | P0.27/LPUART0_TX/UART0B_RTS/TMR1D_O |
RSTN_32670 | 35 | RSTN | RSTN |
All connector pinouts for the ESP32 Development Board are described in the table and its schematic diagram below.
Pin Name | Pin Number | Pin Description |
EN | 1 | P0_27_32670 |
GPIO | 2 | P0_21_32670 |
GPIO | 3 | P0_23_32670 |
GPIO | 4 | P0_24_32670 |
GPIO | 5 | P0_25_32670 |
GPIO | 6 | P0_26_32670 |
GPIO | 7 | I2C2_SDA_32670 |
GPIO | 8 | I2C1_SCL_32670 |
GPIO | 9 | I2C1_SDA_32670 |
GPIO | 10 | I2C2_SCL_32670 |
HSPI CLK | 11 | SPI0_SCK_32670 |
HSPI MISO | 12 | SPI0_MISO_32670 |
HSPI MOSI | 13 | SPI0_MOSI_32670 |
GPIO | 14 | |
GPIO | 15 | |
GPIO | 16 | |
GND | 17 | GND |
VIN | 18 | VOUT_3130(def)/VCC_31334 |
VSPI MOSI | 1 | SPI1_MOSI_32670 |
I2C SCL | 2 | I2C0_SCL_32670 |
UART 0 TX | 3 | UART0A_TX_32670 |
UART 0 RX | 4 | UART0A_RX_32670 |
I2C SDA | 5 | I2C0_SDA_32670 |
VSPI MISO | 6 | SPI1_MISO_32670 |
VSPI CLK | 7 | SPI1_SCK_32670 |
VSPI CS0 | 8 | SPI1_SS0_32670 |
UART 2 TX | 9 | UART1A_TX_32670 |
UART 2 RX | 10 | UART1A_RX_32670 |
RTC | 11 | UART0A_CTS_32670 |
RTC | 12 | UART0A_RTS_32670 |
RTC | 13 | SPI0_SS0_32670 |
RTC | 14 | UART1A_CTS_32670 |
SDI | 15 | |
SDO | 16 | |
SCK | 17 | |
3V3 | 18 | VOUT_3130 |
Net Name | Pin Number | Pin Name | Description |
P4 | |||
-- | 1 | NC | |
1V8_SSB0/3V3_SSB3(def) | 2 | IOREF | POW |
RSTN_32670 | 3 | RESET | AVR/POW |
VOUT_3130 | 4 | 3.3V | POW |
-- | 5 | 5V | POW |
-- | 6 | GND | POW |
-- | 7 | GND | POW |
1V8_SSB0/0V7_SSB2/3V3_SSB3(def)/VCC_31334 | 8 | VIN | POW |
P3 | |||
P0_21_32670 | 1 | A0/PC0 | AVR/DIG/ANA |
P0_23_32670 | 2 | A1/PC1 | AVR/DIG/ANA |
P0_24_32670 | 3 | A2/PC2 | AVR/DIG/ANA |
P0_25_32670 | 4 | A3/PC3 | AVR/DIG/ANA |
I2C1_SDA_32670(def)/I2C2_SDA_32670 | 5 | A4/PC4/SDA | AVR/DIG/ANA/I2C |
I2C1_SCL_32670(def)/I2C2_SCL_32670 | 6 | A5/PC5/SCL | AVR/DIG/ANA/I2C |
P6 | |||
I2C0_SCL_32670 | 1 | PC5/SCL | AVR/DIG/ANA/I2C |
I2C0_SDA_32670 | 2 | PC4/SDA | AVR/DIG/ANA/I2C |
-- | 3 | AREF | POW |
-- | 4 | GND | POW |
SPI0_SCK_32670 | 5 | PB5/SCK | AVR/DIG/SPI |
SPI0_MISO_32670 | 6 | PB4/MISO | AVR/DIG/SPI |
SPI0_MOSI_32670 | 7 | PB3/MOSI | AVR/DIG/SPI/PWM |
SPI0_SS0_32670 | 8 | PB2/SS | AVR/DIG/SPI/PWM |
SWDCLKB_32670 | 9 | PB1 | AVR/DIG/PWM |
SWDIOB_32670 | 10 | PB0 | AVR/DIG |
P7 | |||
SPI1_SS0_32670 | 1 | PD7 | AVR/DIG |
UART0A_CTS_32670 | 2 | PD6 | AVR/DIG/PWM |
UART1A_CTS_32670 | 3 | PD5 | AVR/DIG/PWM |
UART0A_RTS_32670 | 4 | PD4 | AVR/DIG |
UART1A_TX_32670 | 5 | PD3 | AVR/DIG/PWM/INT |
UART1A_RX_32670 | 6 | PD2 | AVR/DIG/INT |
UART0A_TX_32670(def)/P0_27_32670 | 7 | PD1 | AVR/DIG/SER |
UART0A_RX_32670(def)/P0_26_32670 | 8 | PD0 | AVR/DIG/SER |
P5 | |||
SPI1_MISO_32670 | 1 | MISO | |
3V3_SSB3(def)/VCC_31334 | 2 | VCC | |
SPI1_SCK_32670 | 3 | SCK | |
SPI1_MOSI_32670 | 4 | MOSI | |
RSTN_32670 | 5 | RESET | |
-- | 6 | GND |
SPI PMOD | ||
Net Name | Pin Number | Pin Name |
SPI0_SS0_32670(def)/SPI1_SS0_32670 | 1 | SS |
SPI0_MOSI_32670 | 2 | MOSI |
SPI0_MISO_32670 | 3 | MISO |
SPI0_SCK_32670 | 4 | SCK |
GND | 5 | GND |
1V8_SSB3/3V3_SSB3(def)/VOUT_3130 | 6 | VCC |
P0_21_32670 | 7 | INT |
P0_26_32670 | 8 | RST |
SWDIOB_32670 | 9 | IO7 |
P0_23_32670 | 10 | IO8 |
GND | 11 | GND |
1V8_SSB3/3V3_SSB3(def)/VOUT_3130 | 12 | VCC |
I2C PMOD | ||
I2C1_SCL_32670/I2C2_SCL_32670 | 1 | SCL |
I2C1_SCL_32670/I2C2_SCL_32670 | 2 | SCL |
I2C1_SDA_32670/I2C2_SDA_32670 | 3 | SDA |
I2C1_SDA_32670/I2C2_SDA_32670 | 4 | SDA |
GND | 5 | GND |
GND | 6 | GND |
1V8_SSB3/3V3_SSB3(def)/VOUT_3130 | 7 | VCC |
1V8_SSB3/3V3_SSB3(def)/VOUT_3130 | 8 | VCC |
These are the wireless connectivity options available to use for Internet of Things (IoT) applications:
These options can be configured by populating C67 with 39 pF for the external antenna or R159 with 0 Ω for on-board RF chip antenna with the center frequency tuned at 915 MHz.
The MAX32670-LR-ARDZ utilizes the LR1110 long range radio connectivity chipset from Semtech. This chipset comes complete with the full low-power, wide area networking protocol built on top of the LoRa radio modulation technique.
The MAX32670 communicates to the LR1110 using the SPI bus, so the users will need to send LoRa commands and data over SPI bus. Library functions calls have been specifically designed to be used with the MAX32670 and LR1110 using SPI bus.
The pins that connect the MAX32670 and the LR1110 are as follows:
Connected to | Net Name | Pin | I/O Name | Function |
P0_21_32670 | - - | 6 | NRESET | NRESET |
P0_27_32670 | - - | 9 | DIO9 | IRQ |
SPI1_SS0_32670 | - - | 10 | DIO8 | RFSW3 |
P0_23_32670 | DIO7_1110 | 11 | DIO7 | RFSW2 |
P0_26_32670 | DIO6_1110 | 19 | DIO6 | RFSW1 |
P0_25_32670 | DIO5_1110 | 20 | DIO5 | RFSW0 |
SPI0_MISO_32670 | - - | 21 | DIO4 | SPI MISO |
SPI0_MOSI_32670 | - - | 22 | DIO3 | SPI MOSI |
SPI0_SCK_32670 | - - | 23 | DIO2 | SPI SCK |
SPI0_SS0_32670 | - - | 24 | DIO1 | SPI NSS |
P0_24_32670 | - - | 25 | DIO0/ BUSY | BUSY |
There are two (2) ways of powering the eval board, and a user may use any combination of power sources.
Each of the different power modes, provides a different level of control and flexibility. You can find a matrix table of the different power modes and their general function here:
Power Source | Voltage Rails Provided | Peripherals Powered | Function |
---|---|---|---|
Terminal Block (P11) | 3 V to 6 V | - MAX32670 - SPI and I2C PMODs - ESP32 connectors - Arduino connectors - LR1110 chip | able to supply ALL voltages any peripheral might need |
Battery Power (BT1) | 3 V and 6 V | - MAX32670 - SPI and I2C PMODs - ESP32 connectors - Arduino connectors - LR1110 chip | able to supply ALL voltages any peripheral might need |
The base board has five LEDs: DS1, DS2, DS3, DS4, and DS5.
Button | Function |
---|---|
DS1 | used as a LED indicator to one of the GPIOs of the MAX32670, P0.28. |
DS2 | used as a LED indicator to one of the GPIOs of the MAX32670, P0.29. |
DS3 | used as a LED indicator for the voltage output from the power supply. |
DS4 | used as a LED indicator for the voltage output from the MAX31334. |
DS5 | used as a LED indicator for the 3.3 V voltage output from the MAX3130. |
This board uses an SWD interface and the MAX32625PICO board for programming the on-board MCUs. See the MAX32625PICO page for more details.
Connected to | Pin Number |
1V8_SSB0/3V3_SSB3(def) | 1 |
SWDIO_32670 | 2 |
GND | 3 |
SWDCLK_32670 | 4 |
GND | 5 |
UART0A_TX_32670 | 6 |
- | 7 |
UART0A_RX_32670 | 8 |
- | 9 |
RSTN_32670 | 10 |
The connector used are based off the 10-pin Arm Cortex standard pinout (0.05“ pin spacing). That pinout is common to both JTAG and SWD debug modes and is depicted in the following image.
The debugger board will need to be plugged in via the USB port in order to program any board.
In order to program the MAX32670 node board, the board must be powered by (1) CR123A battery or by an external power supply through P11. Otherwise, there will be no connection between the two boards.
Note that this setup only applies for MAX32670-LR-ARDZ Base Board. Users may use a different base board or microcontroller, however the firmware built for this demo application cannot be used as this is specifically designed for the MAX32670-LR-ARDZ.
Make sure to check for the battery polarity in the BT1 connector, refer to the figure below. The DS3 LED will light up indicating that you have inserted the battery correctly and that power is provided in the base board.
Make sure that the MAX32625PICO programming adapter has been flashed with the correct image before connecting it to the MAX32670-LR-ARDZ Base Board. If you do not know how to load the image, click on the instructions below:
Once you have completed this setup, proceed to PHASE 2 found in ADI Long Range Wireless Radio Software User Guide.
MAX32670-LR Design Support Package
REV C
For questions and more information, please visit the Analog Devices Engineer Zone.
End of Document