Microcontroller Board with AVR ATmega128, USB Interface, RS232/RS485, Realtime Clock and SD-Card.

Savvy128 V1.3 is a highly integrated micro controller board with the Atmel AVR ATmega128, USB interface, RS232, realtime clock and sd-card.

Options

Frequency
The XTAL crystal is a wired HC49 type and comes with the module. The frequency can be selected as option from 3.6864MHz up to 16MHz.

Scope of Delivery

Savvy128 is being shipped als fully SMT-assembled controller board with all other components included as kit. Depending on application requirements, certain functions can be assembled as necessary.

The kit consists the following components: 9pin Sub-D connector, USB connector, 2pin power connector with matching cable connector, 2x 26pin headers for expansion boards, AVR ISP header, connector for SavvyDISP, HC49 crystal (frequency selectable), 2x push buttons, two-color LED, IR-detector.

Further Informations

Technical Data

• the ATmega128 microcontroller
• MMC/SD-card header (with level shifters!)
• serial RS232 interface with driver
• (optional RS485 driver)
• USB 2.0 full speed interface with USB UART converter CP2102
• infrared detector for standard remote controls
• 2 push buttons
• two-color LED for the application
• reset (protection) circuitry
• standard 6-pin AVR ISP header
• HC49 XTAL crystal (frequency selectable)
• onboard status LED
• 3.3V voltage regulator
• optional 5V regulator
• pin headers with all ATmega128 signals for expansion cards

Product Documentation

V1.3

• Savvy128 V1.3 Infosheet
• Savvy128 V1.3 Schematics
• Savvy128 V1.3 PCB

V1.2

• Savvy128 V1.2 Infosheet
• Savvy128 V1.2 Schematics
• Savvy128 V1.2 PCB

older Versions

• Savvy128 V1.0 Infosheet

Allgemeine Infos

• Excel sheet with mapping of ATmega128 signals to Savvy128 connectors and dependencies of onboard peripherals.

Thanks to Peter Saitz for providing this useful signal/connectors overview!

Code Examples

• Mini FAT Implementation for SD-Cards (read only, no directories, FAT12/16)
• Full FAT Implementation for SD-Cards (one file open at a time)
• Full FAT Implementation for SD-Cards (multiple files open)

The original source of the FAT examples is http://www.holger-klabunde.de.

• Simple LCD test program for Savvy128 and SavvyDISP.
• Testprogram for UARTs/USB and the LCD. All components are initialized, when no character is received, a dot (.) is transmitted through UARTs, if a character is received, it is transmitted through UARTs and shown on the LCD.
• This program reads a file on SD-card and sends the content to the serial port (USART).
• Testprogram for the Savvy128 Realtime Clock Chip.
• Software RC5 decoder for IR remote controls (CodeVision compiler, but is a good basis for other compilers)

Thanks to Johan Cardon (johancardoen_at_skynet_dot_be) for providing this RC5 decoder example!

Datasheets and Drivers

Atmel

• Atmel AVR ATmega128 microcontroller

Silicon Laboratories

• CP2102 USB UART Bridge Datasheet
• CP2102 Homepage
• Virtual COM Port Drivers for Windows 2000/XP/Server 2003/Vista, Macintosh OS9/OSX, Linux 2.4/2.6

Epson

• RTC-8564JE Datenblatt
• RTC-8564JE Application Manual