Microcontroller Module with ATmega2560, USB, RS485, RS232.

Crumb2560 V1.1 is a versatile, small (just 60x30mm footprint!) microcontroller module with the ATmega2560 microcontroller, a CP2102 USB UART converter, a MAX3221 RS232 transceiver and a 75ALS176 RS485 transceiver. All ATmega2560 signals are available on pads. A watch crystal (TOSC) is preassembled and a selectable XTAL crystal is included.

The Crumb2560 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

• ATmega2560 (256k Flash, 8k SRAM, 4k EEPROM)
• Interfaces: 4x UART, SPI, TWI (I2C), ADC, ext. processor bus
• ISP interface with 6-pin standard pinout
• CP2102 USB UART converter at UART0
• MAX3221 RS232 transceiver at UART2
• SN75ALS176 RS485 transceiver at UART3
• 32768Hz watch crystal preassembled
• XTAL crystal frequency selectable
• connections: 2x 48-pin with all processor signals, USB mini-B connector, 1x 6-pin ISP, 3pin 3.5mm screw terminal pads for RS485
• 2.54mm (1/10inch) modular grid
• dimensions: 60.96mm x 30.48mm

Product Documentation

• Crumb2560 V1.1 Infosheet
• Crumb2560 V1.1 Schematics
• Crumb2560 V1.1 PCB

Datasheets and Drivers

Atmel

• Atmel AVR ATmega2560 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

dpc - Homecontrol

• dpc - Homepage by Ulrich Piechnick Ulrich Piechnick develops a bus-capable homecontrol system, which provides various IO modules. A basis module uses a Crumb2560 as microprocessor plattform. The bus protocol is described well, so that own extensions can be done easily. The firmware for the Crumb2560 module will be avalable soon.

Eagle Library

• Schematic symbols and layout footprints as Eagle library

Microcontroller Module with ATmega2560, USB, RS485, RS232.

Crumb2560 V1.1 is a versatile, small (just 60x30mm footprint!) microcontroller module with the ATmega2560 microcontroller, a CP2102 USB UART converter, a MAX3221 RS232 transceiver and a 75ALS176 RS485 transceiver. All ATmega2560 signals are available on pads. A watch crystal (TOSC) is preassembled and a selectable XTAL crystal is included.

The Crumb2560 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 info sheet (see download link below).

Technical Data

• ATmega2560 (256k Flash, 8k SRAM, 4k EEPROM)
• Interfaces: 4x UART, SPI, TWI (I2C), ADC, ext. processor bus
• ISP interface with 6-pin standard pinout
• CP2102 USB UART converter at UART0
• MAX3221 RS232 transceiver at UART2
• SN75ALS176 RS485 transceiver at UART3
• 32768Hz watch crystal preassembled
• XTAL crystal frequency selectable
• connections: 2x 48-pin with all processor signals, USB mini-B connector, 1x 6-pin ISP, 3pin 3.5mm screw terminal pads for RS485
• 2.54mm (1/10inch) modular grid
• dimensions: 60.96mm x 30.48mm

Product Documentation

• Crumb2560 Infosheet
• Crumb2560 Schematics
• Crumb2560 PCB

Datasheets and Drivers

Atmel

• Atmel AVR ATmega2560 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

dpc - Homecontrol

• dpc - Homepage by Ulrich Piechnick Ulrich Piechnick develops a bus-capable homecontrol system, which provides various IO modules. A basis module uses a Crumb2560 as microprocessor plattform. The bus protocol is described well, so that own extensions can be done easily. The firmware for the Crumb2560 module will be avalable soon.

Eagle Library

• Schematic symbols and layout footprints as Eagle library