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Car Access

Microchip’s Passive Entry Pass Start (PEPS) system enables hands-free interaction with the vehicle. It allows the driver to lock or unlock the vehicle doors and to start or stop the vehicle engine without performing any manual action either with the key fob or a mechanical key. Individual key fobs can be customized for drivers, adjusting seat and mirror positions automatically and setting the car's infotainment system settings. Although the key fob can include a conventional Remote Keyless Entry (RKE) button, PEPS allows a more natural and convenient way to enter and start the vehicle while maintaining a high level of safety and security.

In a bi-directional PEPS system, the key fob and the vehicle module both contain transceivers that communicate wirelessly to detect each other. The module in the vehicle continually sends out encoded messages and it responds when the key fob is in range. If the encrypted messages are correct, they identify the vehicle and key fob to each other and the door opens, allowing the car to start. A traditional uni-directional RKE PEPS can also be implemented with Microchip’s solutions.

Passive Entry - Passive Start (Car Access) Block Diagram


Solutions
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Microcontroller (MCU) + Immobilizer + 3D LF Receiver

The ATA5700/ATA5702 is a highly integrated, ultra-low power car access controller for Passive Entry/ Passive Start (PEPS) and Remote Keyless Entry (RKE) applications with an embedded AVR® 8-bit microcontroller in a single QFN 38 package. The device includes a highly sensitive 3D Low Frequency (LF) receiver, an immobilizer front end, and an Ultra-High Frequency (UHF) Amplitude Shift Keying (ASK)/Frequency Shift Keying (FSK) Radio Frequency (RF) transmitter. It combines ultra-low power LF technology with outstanding RF performance.

  • ATA5700 – 3D LF receiver, immobilizer and UHF transmitter

LF Driver

The ATA5291 is an LF antenna driver device for Passive Entry/Passive Start (PEPS) systems. It can drive up to eight low-frequency antennas (coils) to provide a wake-up and initialization channel to the key fob. Each driver is programmable up to a peak current of 1A (independent of battery voltage) and adjustable in 18 steps.

  • ATA5291 – LF antenna driver device for PEPS systems

RF Transceiver

The ATA5833 is a highly integrated, low-power UHF ASK/FSK RF transceiver with an integrated AVR® microcontroller, an RF front end and a digital baseband. The product is designed for the ISM frequency bands in the ranges of 310 MHz to 318 MHz, 418 MHz to 477 MHz and 836 MHz to 956 MHz. The external part count is kept to a minimum due to the very high level of integration in this device. By combining outstanding RF performance with highly sophisticated baseband signal processing, robust wireless communication can be easily achieved.

  • ATA5833 – UHF ASK/FSK transceiver

Microcontrollers and Digital Signal Controllers

Microchip offers the broadest portfolio of automotive-grade 8-, 16- and 32-bit microcontrollers (MCUs) and Digital Signal Controllers (DSCs) in the industry. With Core Independent Peripherals and multiple connectivity and package options to choose from, you will surely find a device that meets your embedded control system’s needs.

  • PIC18F26K83 – 28-pin, low-power, high-performance MCU with CAN technology
  • dsPIC33EV128GM102 – 16-bit, 5V DSC with PWM, SENT, CAN, op amps and advanced analog features
  • dsPIC33CK256MP502 – 16-bit high-performance DSC with integrated analog, CAN FD and functional safety features
  • PIC32MZ1024EFF144 – 32-bit MCU with FPU, audio and graphics interfaces, Hi-Speed USB, Ethernet and advanced analog

CAN Transceivers

Our portfolio of CAN transceivers includes CAN 2.0, CAN Flexible Data Rate (CAN FD) and CAN Partial Networking (CAN PN) transceivers and supports the ISO 11898 2/5/6, ISO 11898-2:2016 and SAE J2962-2 standards. Features include various wake-up functionalities and exceptional EMC performance even without a common-mode choke. We also offer the industry’s first AEC-Q100 Grade 0 (150°C) qualified CAN transceiver family.

  • ATA6562 – High-speed CAN FD transceiver with standby and silent mode and WUP
  • MCP2561FD – High-speed CAN FD transceiver with standby mode and SPLIT pin
  • ATA6570 – High-speed CAN FD transceiver with Partial Networking

Voltage Regulators

Our basic power management solutions include several automotive-grade linear and switched voltage regulators. Linear regulators feature low dropout voltages, ultra-low quiescent currents, wide input voltage ranges, load dump and reverse batter protection. Switching regulators support buck, boost, buck-boost and SEPIC designs from 100 mA to 12A output currents.

  • MAQ5280 – High-performance, low-dropout regulator, 25 mA, 120V, Adjustable Vout from 1.215 to 5V.
  • MCP1790 – 30V, 70 mA, load dump protected linear voltage regulator
  • MCP1755 – 300 mA, 16V, high-performance LDO
Development Tools
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The Automotive Networking Development Board is a low-cost modular development system for Microchip’s 8-bit, 16-bit, and 32-bit microcontrollers targeting CAN and LIN network related applications. The board supports devices using the 100-pin Plug-In Module (PIM) connector, has four mikroBUS™ sockets for MikroElektronika™ Click boards™ and includes an edge connector for backwards compatibility to PICtail™ Plus boards used with the Explorer 16 Development Board.



The dsPIC33CK Curiosity Development Board is a cost-effective development and demonstration platform for the dsPIC33CK family of single-core high-performance DSCs. Designed to take full advantage of MPLAB® X Integrated Development Environment (IDE), the board includes an integrated programmer/debugger and requires no additional hardware, making it a perfect starting point to explore the dsPIC33CK family. The board also includes a mikroBUS™ socket for adding a Click board™ to explore CAN FD communication.



The dsPIC33EV 5V CAN-LIN Starter Kit features the dsPIC33EV256GM106 Digital Signal Controller (DSC) for automotive and motor control applications. The Starter Kit contains serial data ports for CAN, LIN and SENT, a self-contained USB programming/debug interface, and an expansion footprint for flexibility in application hardware development. This board allows you to explore three popular automotive and industrial serial data formats (CAN, LIN and SENT).



The MAQ5280 Evaluation Board demonstrates the features of the MAQ5280, a high-performance linear regulator, offering a very low-noise output with a very wide input voltage operating range, from 4.5V to 120V DC input voltage.



The Explorer 16/32 Development Kit is a flexible, convenient and ready-to-start development, demonstration and testing platform for 16-bit PIC24 MCUs, dsPIC DSCs and 32-bit PIC32 MCUs. The board accepts Processor Plug-In Modules (PIM) and hardware expansion is possible through the use of PICtail Plus daughter cards and MikroElektronika accessory boards.



The CryptoAutomotive In-Vehicle Network (IVN) Trust Anchor/Border Security Device (TA/BSD) development kit enables Original Equipment Manufacturers (OEMs) and Tier 1 customers to add comprehensive security to networked vehicle systems with minimal impact on current designs while providing the highest level of protection against threats. The only security-specific automotive tool in the industry, the CryptoAutomotive TA/BSD development kit together with a host MCU emulates a node in an automotive network and provides system designers with an intuitive starting point for implementing security.