APPLICATION NOTE Atmel ATA6612/ATA6613/ATA6614-EK Development Board V1.2 ATA6612/ATA6613/ATA6614 Features All necessary components to put the Atmel ATA6612/ATA6613/ATA6614 in operation are included Placeholders for some optional components for extended functions included All pins easily accessible Easily adaptable watchdog times by replacing a single resistor Possibility to activate an external NPN-transistor for boosting up the output current of the voltage regulator (jumper JP3) Possibility of selecting between master or slave operation (mounting D2 and R1) Possibility to mount an external quartz to handle time-critical applications (not necessary for LIN communication) Push button included for creating a local wake-up after having entered the sleep or silent mode Ground coulter clip for connecting probes easily when measuring with the oscilloscope Figure 1. Atmel ATA6612/ATA6613/ATA6614 Development Board 9127E-AUTO-03/151. Introduction The development board for the Atmel ATA6612/ATA6613/ATA6614 ICs is designed to give designers a quick start with the respective IC and to enable prototyping and testing new LIN designs. The Atmel ATA6612, the Atmel ATA6613 and the Atmel ATA6614 form a single-package dual-chip circuit family for LIN-bus slave and master node applications. They support highly integrated solutions for in-vehicle LIN networks. The LIN-system- basis-chip (LIN SBC) consists of a voltage regulator, a window watchdog, and a fully integrated LIN transceiver, which is in accordance with the LIN specifications 2.0, 2.1 and SAEJ2602-2. The second chip is a microcontroller from Atmel s series of AVR 8-bit microcontrollers with advanced RISC architecture (Atmel ATmega88 in Atmel ATA6612, the Atmel ATmega168 in Atmel ATA6613 and the Atmel ATmega328P in Atmel ATA6614). The included AVR provides the following features: 8/16/32Kbytes of in-system programmable flash with read-while-write capabilities 512/512/1024bytes EEPROM 1/1/2Kbyte SRAM 23 general purpose I/O lines 32 general purpose working registers Internal 8MHz RC oscillator calibrated at 5V at 25C 3 flexible timer/counters with compare modes Internal and external interrupts Serial programmable USART suitable for LIN communication Byte-oriented 2-wire serial interface SPI serial port 8-channel 10-bit ADC Five software-selectable power-saving modes: Idle mode stops the CPU while allowing the SRAM, timer/counters, USART, 2-wire serial interface, SPI port, and interrupt system to continue functioning. Power-down mode saves the register contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hardware reset. Power-save mode: the asynchronous timer continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping. ADC noise reduction mode stops the CPU and all I/O modules except asynchronous timer and ADC, to minimize switching noise during ADC conversions. Standby mode: the crystal/resonator oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption. The Atmel ATA6624, included in the Atmel ATA6612 and the Atmel ATA6613, as well as the Atmel ATA6630 included in the Atmel ATA6614, provide the following features: Master and slave operation possible Supply voltage up to 40V Operating voltage V = 5V to 27V S Typically 10A supply current during sleep mode (V switched off) CC 5V linear low-drop voltage regulator with 85mA current capability VCC undervoltage detection (4ms reset time) and watchdog reset logical combined at open drain output NRES Boosting the voltage regulator possible with an external NPN transistor LIN physical layer according to LIN 2.0, LIN2.1 specification and SAEJ2602-2 Wake-up capability via LIN-bus, WAKE pin, or Kl 15 pin INH output to control an external voltage regulator or to switch off the master pull up resistor TXD time-out timer Bus pin is overtemperature and short circuit protected versus GND and battery Adjustable watchdog time via external resistor 2 ATA6612/ATA6613/ATA6614 APPLICATION NOTE 9127EAUTO03/15