Microcontroller Module with ATmega644P Chip45 Crumb644 V1.0

Crumb644 V1.0 is a versatile, very small (just 51×18mm footprint!) microcontroller module with the ATmega644P microcontroller, a CP2102 USB UART converter and a 75ALS176 RS485 transceiver.

Detailed Description

All ATmega644P signals are available on pads. A selectable XTAL crystal is included.

The Crumb644 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.

Technical Data

ATmega644P (64k Flash, 4k SRAM, 4k EEPROM)
Interfaces: 2×UART, SPI, TWI (I2C), ADC
ISP interface with 6-pin standard pinout
CP2102 USB UART converter at UART0
75ALS176 RS232 transceiver at UART1
XTAL crystal frequency selectable
connections: 2×20-pin with all processor signals, 1×5-pin with USB and RS485signals, 1×6-pin ISP
2.54mm (1/10inch) modular grid
dimensions: 50.8mm × 17.8mm

Schematic diagram microcontroleer module CRUMB644

Click to enlarge

Other Names:

AVRCRUMB644, AVR CRUMB644