ATA6617-EK Microchip

APPLICATION NOTE Atmel ATA6616-EK/ATA6617-EK Development Board V1.1 ATA6616-EK/ATA6617-EK Introduction The development board for the Atmel ATA6616/ATA6617 ICs enables users to rapidly prototyping and testing of new LIN designs on the Atmel ATA6616 and Atmel ATA6617 ICs. Figure 1. Atmel ATA6616-EK/ATA6617-EK Development Board The Atmel ATA6616 and Atmel ATA6617 are dual-chip System-in-Package (SIP) products especially well suited for complete LIN-bus slave and master node applications supporting highly integrated in-vehicle LIN networking solutions. The first chip of the dual-chip SIP is the Atmel LIN System Basis Chip (LIN SBC) Atmel ATA6624 with an integrated 5V voltage regulator, a window watchdog, and a fully integrated LIN transceiver complying with the LIN 2.1 specification. The second chip is an automotive microcontroller within the Atmel AVR 8-bit microcontroller series with advanced RISC architecture (Atmel ATtiny87 with 8K flash in Atmel ATA6616 and the Atmel ATtiny167 with 16K flash in Atmel ATA6617). All pins of both integrated chips are bonded out to provide customers with the same flexibility for their applications which they have when using discrete parts. There is no internal con- nection between the two chips. 9342D-AUTO-09/13 The supplied LIN SBC Atmel ATA6624 has 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 is switched off) CC Typically 40A supply current in Silent Mode Linear low-drop voltage regulator 5V, 85mA current capability VCC undervoltage detection (4ms reset time) and watchdog reset logically combined at NRES Open drain output voltage regulator, boosting possible with external NPN transistor LIN physical layer complies with LIN 2.1 specification and SAE J2602-2 Wake-up capability via LIN bus, WAKE pin, or Kl 15 pin INH output for external voltage regulator control or for switching off 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 The supplied AVR (Atmel ATtiny87 or Atmel ATtiny167) has the following features: 8/16Kbytes of in-system programmable flash with read-while-write capabilities 512bytes EEPROM 512bytes SRAM 16 general purpose I/O lines 32 general purpose working registers Internal 8MHz RC oscillator calibrated for 5V at 25C Two flexible timer/counters with compare modes Internal and external interrupts LIN 2.1 and LIN 1.3 controller or 8-bit UART Byte-oriented two-wire serial interface Master/slave SPI serial interface 4-channel 10-bit ADC Five software-selectable power-saving modes: Idle Mode stops the CPU while allowing the SRAM, timer/counters, ADC, analog comparator 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 ADC, minimizing switching noise during ADC conversions. Standby Mode: the crystal/resonator oscillator runs while the rest of the device is sleeping. This allows very fast start-up while limiting power consumption. 2 ATA6616-EK/ATA6617-EK APPLICATION NOTE 9342DAUTO09/13