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Communications Protocol
ACK/NAK Data Flow Examples
Setup 1
RES
0x00 (disabled)
REQ
0x00 (disabled)
STX
0x00 (disabled)
ETX
0x00 (disabled)
0x06
ACK
0x15
NAK
LRC
disabled
Transfer 1
HOST_TX
IMAGER_TX
Transfer 2
HOST_TX
IMAGER_TX
IMAGER_TX
HOST_TX
Error Condition
Transfer 1
IMAGER_TX
HOST_TX
IMAGER_TX
HOST_TX
Transfer 2
HOST_TX
IMAGER_TX
IMAGER_TX
timeout reached...
timeout reached...
timeout reached...
Timeout Reached
A-16
<K141,0>
'ACK'
<K141?>
'ACK'
<K141,0>
'ACK'
symbol data
'NAK' (host rejects)
symbol data (resend data)
'ACK' (transaction complete)
<K141?>
'ACK'
<K141,0>
transaction aborted, data is flushed
Quadrus MINI Imager User's Manual
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