ATMEL CORPORATION has introduced a family of AVR 8-bit microcontrollers for automotive control applications. The first products to be marketed are the ATmega16M1 and ATmega32M1, which are used to control the belt and sensorless brushless DC (BLDC) motors.
With the increasing number of motors in automobiles, car manufacturers need motors that are more sturdy in size, lighter in weight, and have a higher torque than brushed motors. They are gradually switching to brushless DC motors that require more complex devices to precisely control speed and torque, which poses new challenges for automotive manufacturing, including high temperature issues - some applications under the hood can reach temperatures up to 150 ° C .
The ATmega16M1 and ATmega32M1 are designed for this need, providing an integrated solution for advanced motor control applications with CAN and LIN buses. In addition, Atmel is working closely with Vector, a leading provider of software tools and components for the network, to provide customers with complete hardware and software solutions.
Window lift motor control with anti-pinch function is a good example of such application requirements, as well as brake and steering electric power, ventilation, air conditioning and sliding door controls are also such applications. In addition, there are automotive intake and turbocharger controls. In this type of application, the motor temperature or the ambient temperature of the controller is higher than the standard 125 ° C (typical temperature is 150 ° C).
The ATmega16M1 and ATmega32M1 use the high-performance AVR 8-bit RISC architecture to integrate all the basic peripherals that meet the requirements of complex algorithms, including various analog blocks, such as 10-bit ADCs with differential and programmable gain options, and selectable levels. Analog comparator; I/O pin change interrupt. These new microcontroller products have all the resources needed to control BLDC motors in automotive systems.
The ATmega16M1 and ATmega32M1 have separate comparator positive and negative inputs, allowing control of the sensorless motor without the need for external active components. These products have three separate comparators for the motor's Back EMF (EMF) measurement; an additional comparator for overcurrent detection with a reference level (comparative level) that can be a DAC Output or any external reference voltage. Its 12-bit multi-purpose synchronous power stage controller has a clock frequency of up to 64 MHz and provides six complementary programmable high speed precision signals to control the three half bridges of the motor. Its maximum frequency is 64kHz and its voltage resolution is about 1/1000. Once the hardware fault detection module detects a fault, it will automatically set the motor to a safe state.
The underlying driver of the PSC requires approximately 2KB of flash and 20 bytes of SRAM. A sensored BLDC driver typically requires 2.7 KB of flash memory and approximately 350 bytes of SRAM. The sensorless BLDC driver requires approximately 3KB of flash memory and 200 bytes of SRAM. Thanks to the integrated hardware functions, the code for implementing LIN communication is only about 1KB. The code size of the CAN stack is approximately 16KB to 24KB. In addition, Atmel will launch products with 64KB of flash memory for applications that may require more code in the second half of 2008.
The ATmega16M1 and ATmega32M1 feature a unique combination of features to safely and reliably control a wide range of BLDC motors with appropriate drive and power components. Its efficient power stage controller and integrated analog functions generate only a small number of interrupts, reducing code size and real-time performance.
Vector's CAN and LIN drivers
MichelPassemard, Director of Automotive Electronics Strategy at Atmel's Microcontrollers Division, said: "One of the key requirements for using embedded in automotive electronics is that CAN and LIN's protocol stacks must be efficient and well supported. Vector handles ATmega16/32M1 Providing CAN and LIN drivers paves the way for Atmel's products to further expand in the automotive electronics market."
Vector has developed CAN and LIN drivers for Atmel's ATmega16/32M1 microcontrollers. These drivers provide support for communication packages for all automotive OEMs. There are currently CAN and LIN drivers and their configuration and generation tools. If required, Vector can provide CANOEM vendor-specific communication software packages, including network management, transport protocols, diagnostics and interaction layer modules; LIN communication software packages are also available upon request, supporting all protocol versions of master/slave configurations, including Transmission and / or diagnostic layer software.
development tools
Atmel's AVR Studio and AVR JTAGICEmkII provide a multi-platform integrated development environment (IDE). In addition, the company also offers STK524 and STK600 with STK600-TQFP32 starter kit for project development. The AVRMC320 motor controller evaluation tool is also available.
Price and availability
Atmel also offers a less functional product: the ATGA32C1 without PSC, dedicated to CAN and LIN applications. Samples of the ATmega32M1 and ATmega32C1 are available now. The package is in the form of a 32-pin QFP/QFN. The ATmega32C1, ATmega16M1 and ATmega32M1 will pass the 125°C and 150°C test certifications and are expected to be mass-produced in August 2008. For the three products that passed the 125°C certification test, the unit price of 10,000 pieces was $2.34, $2.34 and $2.52 respectively. The ATmega64M1 with 64KB of flash memory will be available in the third quarter of 2008.
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With the increasing number of motors in automobiles, car manufacturers need motors that are more sturdy in size, lighter in weight, and have a higher torque than brushed motors. They are gradually switching to brushless DC motors that require more complex devices to precisely control speed and torque, which poses new challenges for automotive manufacturing, including high temperature issues - some applications under the hood can reach temperatures up to 150 ° C .
The ATmega16M1 and ATmega32M1 are designed for this need, providing an integrated solution for advanced motor control applications with CAN and LIN buses. In addition, Atmel is working closely with Vector, a leading provider of software tools and components for the network, to provide customers with complete hardware and software solutions.
Window lift motor control with anti-pinch function is a good example of such application requirements, as well as brake and steering electric power, ventilation, air conditioning and sliding door controls are also such applications. In addition, there are automotive intake and turbocharger controls. In this type of application, the motor temperature or the ambient temperature of the controller is higher than the standard 125 ° C (typical temperature is 150 ° C).
The ATmega16M1 and ATmega32M1 use the high-performance AVR 8-bit RISC architecture to integrate all the basic peripherals that meet the requirements of complex algorithms, including various analog blocks, such as 10-bit ADCs with differential and programmable gain options, and selectable levels. Analog comparator; I/O pin change interrupt. These new microcontroller products have all the resources needed to control BLDC motors in automotive systems.
The ATmega16M1 and ATmega32M1 have separate comparator positive and negative inputs, allowing control of the sensorless motor without the need for external active components. These products have three separate comparators for the motor's Back EMF (EMF) measurement; an additional comparator for overcurrent detection with a reference level (comparative level) that can be a DAC Output or any external reference voltage. Its 12-bit multi-purpose synchronous power stage controller has a clock frequency of up to 64 MHz and provides six complementary programmable high speed precision signals to control the three half bridges of the motor. Its maximum frequency is 64kHz and its voltage resolution is about 1/1000. Once the hardware fault detection module detects a fault, it will automatically set the motor to a safe state.
The underlying driver of the PSC requires approximately 2KB of flash and 20 bytes of SRAM. A sensored BLDC driver typically requires 2.7 KB of flash memory and approximately 350 bytes of SRAM. The sensorless BLDC driver requires approximately 3KB of flash memory and 200 bytes of SRAM. Thanks to the integrated hardware functions, the code for implementing LIN communication is only about 1KB. The code size of the CAN stack is approximately 16KB to 24KB. In addition, Atmel will launch products with 64KB of flash memory for applications that may require more code in the second half of 2008.
The ATmega16M1 and ATmega32M1 feature a unique combination of features to safely and reliably control a wide range of BLDC motors with appropriate drive and power components. Its efficient power stage controller and integrated analog functions generate only a small number of interrupts, reducing code size and real-time performance.
Vector's CAN and LIN drivers
MichelPassemard, Director of Automotive Electronics Strategy at Atmel's Microcontrollers Division, said: "One of the key requirements for using embedded in automotive electronics is that CAN and LIN's protocol stacks must be efficient and well supported. Vector handles ATmega16/32M1 Providing CAN and LIN drivers paves the way for Atmel's products to further expand in the automotive electronics market."
Vector has developed CAN and LIN drivers for Atmel's ATmega16/32M1 microcontrollers. These drivers provide support for communication packages for all automotive OEMs. There are currently CAN and LIN drivers and their configuration and generation tools. If required, Vector can provide CANOEM vendor-specific communication software packages, including network management, transport protocols, diagnostics and interaction layer modules; LIN communication software packages are also available upon request, supporting all protocol versions of master/slave configurations, including Transmission and / or diagnostic layer software.
development tools
Atmel's AVR Studio and AVR JTAGICEmkII provide a multi-platform integrated development environment (IDE). In addition, the company also offers STK524 and STK600 with STK600-TQFP32 starter kit for project development. The AVRMC320 motor controller evaluation tool is also available.
Price and availability
Atmel also offers a less functional product: the ATGA32C1 without PSC, dedicated to CAN and LIN applications. Samples of the ATmega32M1 and ATmega32C1 are available now. The package is in the form of a 32-pin QFP/QFN. The ATmega32C1, ATmega16M1 and ATmega32M1 will pass the 125°C and 150°C test certifications and are expected to be mass-produced in August 2008. For the three products that passed the 125°C certification test, the unit price of 10,000 pieces was $2.34, $2.34 and $2.52 respectively. The ATmega64M1 with 64KB of flash memory will be available in the third quarter of 2008.
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