8-bit
Microcontrollers
Application Note
Rev. 1472D-AVR-01/08
AVR350: Xmodem CRC Receive Utility for AVR
®
Features
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Programmable Baud Rate
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Half Duplex
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128-byte Data Packets
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CRC Data Verification
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Framing Error Detection
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OverRun Detection
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Less than 1K Bytes of Code Space
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C High-level Language Code
1 Introduction
The Xmodem protocol was created years ago as a simple means of having two
computers talk to each other. With its half-duplex mode of operation, 128-byte
packets, ACK/NACK responses and CRC data checking, the Xmodem protocol has
found its way into many applications. In fact most communication packages found
in the PC today have a Xmodem protocol available to the user.
