ATA6664-EK Microchip

APPLICATION NOTE ATA6663/ATA6664 Development Board ATA6663/ATA6664 Introduction 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 succes- sor 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 conve- nience 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. 9201B-AUTO-06/15Figure 1. Atmel ATA6663/ATA6664 Development Board Development Board Features The development board for the Atmel ATA6663/ATA6664 supports the following features: 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 Quick Start The development board for the Atmel ATA6663/ATA6664 is shipped with all components necessary to immediately start the development of a LIN slave node. Connecting an external 12V DC power supply between the terminals VBAT and GND puts the IC in fail-safe mode. In this mode, the INH pin is switched to the VS level which can be used to enable an external voltage regulator (not included on the board). The LIN pin is in the recessive state. Please note that the communication is still inactive during fail-safe mode. To communicate via the LIN bus interface, you have to switch the device into normal mode by applying a high level (for example 5V) at pin EN. As RXD is an open-drain output, the required pull-up resistor R2 can be activated by applying +5V DC voltage, on the designated pin on the board. 2 ATA6663/ATA6664 APPLICATION NOTE 9201BAUTO06/15