Microcontroller Module with ATmegaX128A1, USB, RS485, SD-Card.

CrumbX128A1 V1.0 is a versatile, very small (just 60x30mm footprint!) microcontroller module with the ATxmega128A1 microcontroller, CP2102 USB UART converter, RS485 transceiver, sd-card slot, voltage regulator. All ATxmega128A1 signals are available on pads. A selectable XTAL crystal or watch crystal is included.

The CrumbX128A1 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

• ATxmega128A1 (128k+8k Flash, 8k SRAM, 2k EEPROM)
• 100pin TQFP package with up to 78 IO lines
• ISP interface with 6-pin standard pinout
• CP2102 USB UART converter at USART0/PORTF
• 75ALS176 RS485 transceiver at USART0/PORTE
• XTAL crystal frequency selectable or watch crystal
• connections: 2x 48-pin with all processor signals, USB and RS485 signals, 1x 6-pin ISP, mini USB B connector (5-pin)
• 2.54mm (1/10inch) modular grid
• dimensions: 60.96mm x 30.48mm

Product Documentation

• CrumbX128A1 V1.0 Infosheet
• CrumbX128A1 V1.0 Schematics
  

Datasheets and Drivers

Atmel

• Atmel AVR ATxmega128A1 Microcontroller Datasheet
• AVR XMEGA A Manual

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