Achieve real-time monitoring and control in automotive and industrial settings with ATA663211 and STM32L496AG

ATA663211 Click is based on the ATA663211, a LIN transceiver from Microchip. It features several protection functionalities, such as over-temperature, short-circuit protection vs. GND and battery, advanced EMC and ESD, and more. The integrated 3.3V onboard LDO voltage regulator is the MCP1804, an LDO regulator with shutdown from Microchip. The combination of a voltage regulator and a bus transceiver makes it possible to develop simple but powerful slave nodes in LIN bus systems. This way, ATA663211 Click can be used as a standalone LIN transceiver without being connected to a mikroBUS™ socket. An onboard LDO (low-dropout regulator) lets it supply power through the VS line screw terminal. This regulated voltage is also available on the +3.3V rail of the mikroBUS™ socket to power up the 3.3V attached host MCU. There are several operating modes for the ATA663211 Click. In Normal mode, the LIN interface is transmitting and receiving. In Sleep mode, the transmission path is disabled, and the LIN transceiver is in low-power mode. The Failsafe mode is automatically switched at system power-up or after a wake-up event. The LIN transceiver

is switched off in this mode, and the inhibit output pin is switched on. For the typical application as a Master node, the ATA663211 requires the LBUS line of the chip to be connected to the VBB of the LIN BUS, achievable via a populated L-PULL jumper. This jumper can be removed in other scenarios, such as the LIN Slave node. The ATA663211 communicates with the MCU using the UART RX and TX signals. Besides communication, these pins also serve to signal the failsafe condition. The undervoltage on the LIN connector can cause the failsafe condition: less than 3.9V will cause the undervoltage condition, signaled by the LOW logic state on the RX pin and the HIGH logic state on the TX pin. A LIN wake-up event from either silent or sleep mode is signaled by the LOW logic state on both the RX and TX pins. This event is received via the LIN bus and is used to switch the ATA663211 click to an active state. On the other hand, Low on TX and HIGH on RX will signal the local wake-up. RX and TX signals are also routed to the header on the edge of the Click board™ so they can be used independently of the mikroBUS™ socket. The inhibit output pin of the LIN transceiver is used

to control the Shutdown input of the MCP1804 LDO; thus, the supply pin of the LIN transceiver itself, as the LDO, supplies the LIN transceiver supply pin with LIN operating voltage. The voltages on this line can be monitored over the INH pin of the mikroBUS™ socket via the resistor divider. To enable the LIN transceiver, there is an EN SEL jumper set to the HI position by default, thus enabling the transceiver. Setting it to the LOW position allows you to control the enable function over the EN pin of the mikroBUS™ socket. In addition, this same pin is routed to the second pair of headers to enable the LIN transceiver externally. The other pin on this header is WKin, a high-voltage input for waking up the device. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.

The 32L496GDISCOVERY Discovery kit serves as a comprehensive demonstration and development platform for the STM32L496AG microcontroller, featuring an Arm® Cortex®-M4 core. Designed for applications that demand a balance of high performance, advanced graphics, and ultra-low power consumption, this kit enables seamless prototyping for a wide range of embedded solutions. With its innovative energy-efficient

architecture, the STM32L496AG integrates extended RAM and the Chrom-ART Accelerator, enhancing graphics performance while maintaining low power consumption. This makes the kit particularly well-suited for applications involving audio processing, graphical user interfaces, and real-time data acquisition, where energy efficiency is a key requirement. For ease of development, the board includes an onboard ST-LINK/V2-1

debugger/programmer, providing a seamless out-of-the-box experience for loading, debugging, and testing applications without requiring additional hardware. The combination of low power features, enhanced memory capabilities, and built-in debugging tools makes the 32L496GDISCOVERY kit an ideal choice for prototyping advanced embedded systems with state-of-the-art energy efficiency.