Microcontroller Module with ATmega128 / AT90CAN128 / ATmega2561, USB, RS485 (,CAN).

Crumb128 V4.0 is a versatile, very small (just 40x30mm footprint!) microcontroller module with the ATmega128 or AT90CAN128 with CAN transceiver or ATmega2561 microcontroller, a CP2102 USB UART converter and a RS485 transceiver. All MCU signals are available on pads. A watch crystal (TOSC) is preassembled and a selectable XTAL crystal is included.

The Crumb128 is being shipped without preassembled pinheaders, since everybody has different preferences here. A suitable Connector Kit with pin headers and receptacles can be ordered optionally.

Further information can be found in the infosheet.

Technical Data

• ATmega128 (128k Flash, 4k SRAM, 4k EEPROM)
• Interfaces: 2x UART, SPI, TWI (I2C), ext. processor bus
• ISP interface with 6-pin standard pinout
• CP2102 USB UART converter at UART0
• SN75ALS176 RS485 transceiver at UART1
• optionally: AT90CAN128 MCU with PCA82C251 CAN transceiver onboard or ATmega2561
• 32768Hz watch crystal preassembled
• XTAL crystal frequency selectable
• connections: 2x 32-pin with all processor signals, 1x 8-pin with USB and RS232 signals, 1x 6-pin ISP
• 2.54mm (1/10inch) modular grid
• dimensions: 40.64mm x 30.48mm

Product Documentation

• Crumb128 V4.0 Infosheet
• Crumb128 V4.0 Schematics

Datasheets and Drivers

Atmel

• Atmel AVR ATmega128 microcontroller
• Atmel AVR ATmega2561 microcontroller
• Atmel AVR AT90CAN128 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

Eagle Library

• Schematic symbols and layout footprints as Eagle library