原标题：Atmel ATA6663低成本LIN应用开发方案

　　Atmel公司的ATA6663是低成本LIN总线收发器,和LIN指标2.0, 2.1与SAEJ2602-2

　　兼容,工作电压5V-27V,波特率高达20K波特,完全和3.3V与5V器件兼容,具有正常和睡眠模式,睡眠模式的功耗低于10μA,主要用在LIN总线网络如汽车车体电子系统,包括门模块,座位控制,智能传感器和动力总成应用.本文介绍了ATA6663/ATA6664主要特性,方框图, 应用框图以及在汽车网络中应用框图和ATA6663/ATA6664开发板主要特性,电路图和PCBV元件布局图.

　　The Atmel ATA6663 is a fully integrated LIN transceiver complying with the LIN specification 2.0, 2.1 and SAEJ2602-2. The Atmel ATA6664 is an identical version,the only difference is that the TXD-dominant Time-out function is disabled so the device is able to send a static low signal to the LIN bus. It interfaces the LIN protocol handler and the physical layer. The device is designed to handle the low-speed data communication in vehicles, for example, in convenience electronics. Improved slope control at the LIN bus ensures secure data communication at up to 20Kbaud with an RC oscillator for protocol handling. Sleep Mode guarantees minimal current consumption even in the case of a floating bus line or a short circuit on the LIN bus to GND.The ATA6663/ATA6664 feature advanced EMI and ESD performance.

　　ATA6663/ATA6664主要特性:

　　• Operating Range from 5V to 27V

　　• Baud Rate up to 20Kbaud

　　• Improved Slew Rate Control According to LIN Specification 2.0, 2.1 and SAEJ2602-2

　　• Fully Compatible with 3.3V and 5V Devices

　　• Atmel ATA6663: TXD Time-out Timer, Atmel ATA6664: No TXD Time-out Timer

　　• Normal and Sleep Mode

　　• Wake-up Capability via LIN Bus (90μs Dominant)

　　• External Wake-up via WAKE Pin (35μs Low Level)

　　• INH Output to Control an External Voltage Regulator or to Switch the Master Pull-up

　　• Very Low Standby Current During Sleep Mode (10μA)

　　• Wake-up Source Recognition

　　• Bus Pin Short-circuit Protected versus GND and Battery

　　• LIN Input Current < 2μA if VBAT Is Disconnected

　　• Overtemperature Protection

　　• High EMC Level

　　• Interference and Damage Protection According to ISO/CD 7637

　　• Fulfills the OEM “Hardware Requirements for LIN in Automotive Applications Rev.1.1”

　　• Packages: SO8, DFN8

　　图1. ATA6663/ATA6664方框图

　　图1. ATA6663/ATA6664应用框图

　　图3. ATA6663/ATA6664在汽车网络中应用框图

　　ATA6663/ATA6664开发板

　　The development board for the Atmel® ATA6663/ATA6664 (Atmel ATA6663-EK,ATA6664-EK) is designed to give users a quick start using these ICs and prototyping and testing new designs. The Atmel ATA6663/ATA6664 is a fully integrated LIN transceiver complying with the LIN 2.0, 2.1 specification and SAEJ2602-2. The devices are nearly identical, the only difference is that the TXD dominant timeout-timer is disabled at the Atmel ATA6664 so this device is able to send a static low signal on the LIN bus.

　　The Atmel ATA6663 is the successor IC of the Atmel ATA6662 with an enhanced EMC performance and improved wake-up behavior resulting in a very low sleep mode current consumption even in the case of a floating bus or a short-circuit between the bus line and GND.

　　The ICs are the interface between the LIN protocol handler and the physical layer and is designed to handle the low-speed data communication in vehicles for example in convenience electronics. Improved slope control on the LIN bus ensures secure data communication of up to 20kBaud.

　　This document has been created as a quick start guide for using the development board of the Atmel ATA6663/ATA6664. Please refer to the corresponding datasheet for more detailed information about the Atmel ATA6663/ATA6664 itself.

　　The development board for the Atmel® ATA6663/ATA6664 supports the following features:

　　ATA6663/ATA6664开发板主要特性:

　　• Includes All Components Necessary for Atmel ATA6663/ATA6664 Operation

　　• All Pins Are Easily Accessible

　　• Can Be Used for Master or Slave Operation

　　• Wake-up Pulse via an On-board Switch

　　图4.ATA6663/ATA6664开发板外形图

　　图5.ATA6663/ATA6664开发板电路图