Motorola LS1000B Specifiche Pagina 75

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4-39
Programming the LS 1004
Hardware and Software Handshaking Sequence
NO REPONSE.
AFTER 2 SECONDS, THE UNIT
BEEPS 4 TIMES TO INDICATE
A TRANSMISSION ERROR.
NOYES
HARDWARE HANDSHAKING
SOFTWARE HANDSHAKING
NO REPONSE.
AFTER 2 SECONDS, THE UNIT
BEEPS 4 TIMES TO INDICATE
A TRANSMISSION ERROR.
UNIT ASSERTS REQUEST-TO-SEND LINE.
HOST RESPONDS BY ASSERTING CLEAR-TO-SEND LINE.
NO
YES
ACK/NAK SWITCH ON?
NO
YES
YES
YES,
NO
NO
4 LONG BEEPS
FINISHED
DATA IS TRANSMITTED
.
WAIT FOR ENQ CHARACTER
TO BE RECEIVED FROM HOST
ENQ SWITCH ON?
WAIT FOR ACK OR NAK RESPONSE FROM HOST
NO REPONSE.
AFTER 2 SECONDS, THE UNIT
BEEPS 4 TIMES TO INDICATE
A TRANSMISSION ERROR.
ACK RESPONSE?
TRY 3 TIMES?
SYMBOL IS DECODED
RTS AND CTS
HANDSHAKING LINES USED
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