Denon DVD 3800BDCI Serial Protocol - Page 6

Communication, errors

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Ver.3.09 %BUB.BS QBHFPG regard to the command that gives operational instructions. 5) The time from the start of command transmission to the end of command transmission should be max 40 msec. 6) The time from the completion of command transmission to the start of answer-back is MAX.60 m 5sec. 7) This unit cannot receive any commands for about 5 seconds after the power switch is turnied on. 1.4.2 Communication errors 1) Having received a command, which results in a communication error ( overrun, framing, or parity error ) , this unit shall give NAK ( 15h ) . ( MAX 80ms from the start of command transmission ) 2) If the host has received NAK from this unit, it shall retransmit the command that it has transmitted immediately beforehand. 3) Having received an answer, which results in a communication error ( overrun, framing, or parity error ) , the host shall respond with NAK. 4) If it has received NAK from the host, this unit shall retransmit the answer it has transmitted immediately beforehand. ( MAX 40ms) 5) When there is no answer from the unit within 6s, the host shall retransmit the command. $PQZSJHIU

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Ver.3.09
Data :
Mar.24.2008
7 page of 50
Copyright
2008
regard
to
the
command
that gives
operational
instructions.
5)
The
time
from
the
start
of
command
transmission
to
the
end
of command
transmission
should
be
max
40
msec.
6)
The
time
from
the
completion
of
command
transmission
to
the
start
of
answer-back
is
MAX.60
m
5
sec.
7)
This
unit
cannot
receive
any
commands
for
about
5
seconds
after
the
power
switch
is
turnied
on.
1.4.2
Communication
errors
1)
Having
received
a
command,
which
results
in
a
communication
error
(
overrun,
framing,
or
parity
error
)
,
this
unit
shall
give
NAK
( 15h
)
.
(
MAX
80ms
from
the
start
of
command
transmission
)
2)
If
the
host
has
received
NAK
from
this
unit,
it
shall
retransmit
the
command
that
it
has
transmitted
immediately
beforehand.
3)
Having
received
an
answer,
which
results
in
a
communication
error
(
overrun,
framing,
or
parity
error
)
,
the
host
shall
respond
with
NAK.
4)
If
it
has
received
NAK
from
the
host,
this
unit
shall
retransmit
the
answer
it
has
transmitted
immediately
beforehand.
(
MAX
40ms)
5)
When
there
is
no
answer
from
the
unit
within
6s,
the
host
shall
retransmit
the
command.