COM20020 Datasheet, PDF (12/72 Pages) SMSC Corporation – COM20020 3.3V ULANC Universal Local Area Network Controller with 2K x 8 On-Board RAM

Acknowledgements
An Acknowledgement is used to acknowledge
reception of a packet or as an affirmative
response to FREE BUFFER ENQUIRIES and is
sent by the following sequence:
#$ An ALERT BURST
#$ An ACK (ACKnowledgement--ASCII code
86H) character
ALERT BURST
ACK
Negative Acknowledgements
A Negative Acknowledgement is used as a
negative response to FREE BUFFER
ENQUIRIES and is sent by the following
sequence:
#$ An ALERT BURST
#$ A NAK (Negative Acknowledgement--ASCII
code 15H) character
ALERT BURST
NAK
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