1. CALLISTO Double - Heterodyne - Frequency Agile - Radio - Spectrometer ERAC Symposium Heppenheim Sep 5/6/7th 2003 Meyer Hansueli ETH Zürich

2. Directory RISC system or PC RISC microcontroller ATmega16 Callisto interfaces Development board C Compiler Overview

3. RISC system or PC RISC processor  Low weight  Cheap  Low Power consumption  Mobility  Easy Interrupt/timer controlling  Including ADC‘s  Including different bus systems (SPI, I2C and Microwire) PC  Higher weight  More expensive  Higher power consumption  Stationary  Difficult to handle interrupts and system processes

4. RISC microcontroller ATmega16  Low-power AVR® 8-bit Microcontroller  advanced RISC Architecture  Up to 16 MIPS Throughput at 16 MHz  16K Bytes of In-System Self-Programmable Flash  512 Bytes internal EEPROM  1K Byte Internal SRAM  16bit Timer/Counters  8-channel, 10-bit ADC  Programmable Serial USART  Master/Slave SPI Serial Interface  I2C bus Interface  32 Programmable I/O Lines  Speed Grades 0 - 16 MHz ATmega16 RISC processor

5. Callisto interfaces Tuner0 Microcontroller ATmega16 Tuner1 Standard PC External EEPROM RS232 Antenna I2C 12us/byte SPI serial bus 15us/byte Video to ADC Up to 500 frequencies Enviromental sensors

6. Development board STK 500  Low cost starter kit  Fully Assembled and Tested from Atmel  Serial In-System Programming  PC based software - Windows 95/98/NT  RS-232 Interface to PC  Sockets for 8-, 20-, 28-, and 40-pin AVR Devices  LEDs and Push Buttons for Experimentation  All AVR I/O Ports Easily Accessible through Pin Header Connectors

7. C Compiler  High Performance C Compiler, Integrated Development Environment  Automatic Program Generator  In-System Programmer for theAtmel AVR family of microcontrollers with internal RAM  Modular programming in C

8. Overview Standard PC AVR C Compiler Design board 1 2 3 RCU (receiver control unit) 4

9. Institute of Astronomy Meyer Hansueli ETH Zentrum, SEC D3 Scheuchzerstrasse 7 CH-8092 Zürich meyerh@astro.phys.ethz.ch Thank you for your attention