Symbol LS 4208 - Page 99

de-asserted, the scanner asserts the RTS line and waits up to Host Serial Response Time-out for the
host
to
assert
CTS.
When
the
host
asserts
CTS,
data
is
transmitted.
If,
after
Host
Serial
Response
Time-out,
the
CTS
line
is
not
asserted,
the
scanner
sounds
a
transmit
error,
and
discards
the
data.
When data transmission is complete, the scanner de-asserts RTS 10 msec after sending the last character.
The host should respond by negating CTS. The scanner checks for a de-asserted CTS upon the next transmission of data.
During
the
transmission
of
data,
the
CTS
line
should
be
asserted.
If
CTS
is
de-asserted
for
more
than
50
ms
between
characters,
the
transmission
is
aborted,
the
scanner
sounds
a
transmission
error,
and
the
data
is
discarded.
If the above communication sequence fails, the scanner issues an error indication. In this case, the data is lost and must
be
rescanned.
If Hardware Handshaking and Software Handshaking are both enabled, Hardware Handshaking
takes
precedence.
The
DTR
signal
is
jumpered
to
the
active
state.
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