• Explanation
of
messages
SOX:
Indicates
the
start
of
exclusive
I
FOH
I Exclusive
status
I DC:
Product
manufacturer
differentiating
ID
150H
I Technics
ID
number
CMD:
Indicates
type
of
transmission
data
and
commands.
21H
HRQ: Hand shake request
22H HRT: Hand shake routine
23H ACK: Acknowledge
24H NAK: Negative Acknowledge
25H TMP: Tempo
data
27H
EOK: End
of
Block
28H END: End
29H ERR:
Error
2AH
FUL:
Memory full
2BH
DRQ:
Data
request
2DH BTR:
Data
block
7EH CDD: Continuing
data
PC:
Technics
product
category
ID
03H
FA
7EH DMY: Dummy
data
for
ACK,NAK,EOK,END,
ERR,FUL
MD:
Model
differentiating
ID
140H
V E
R:
Exclusive version
control
ID
110H I
Ver2-0
[data]:
Body
of
data
·[data]
for
Individual
data,
Data
dump,
and
Data
request.
ADR ADR(MSB)
ADR
ADR(LSB)
SIZ
SIZ(MSB)
DT
CN
SM
ADR:
SIZ
SIZ(LSB)
ADDRESS MSB
(7bit)
(
7bit)
ADDRESS
LSB
(7bit)
MSB
of the address length of
relevant
data
from the above
address.
(7bit)
(
7bit)
LSB
of
the address length
of
relevant
data
from
the above
address.
(7bit)
data
Continue
ID
Checksum
Indicates address length
of
beginning
data.
The type of
data
is recognized by
this
value. The 21-bit address is
divided
into
3bytes
of
7
bits
each, and is sent in order
beginning with the upper end.
(Refer
to
the address
SIZ:
Indicates length
of
address
from
ADR.
(Refer
to
the
address
map.)
The 21-bit address length is divided
into
3 bytes
of
7 bytes each, and is
sent
in order beginning
with the upper end.
If a size
not
consistent
with
the
data
is indicated,
data
request is ineffective.
If
the
data
request concerns the
data
dump, then dummy
data
is sent, although
it
has
no
significance.
DT :
Body
of
transmitted
data.
The 8-bit
data
is divided
into
2 bytes
of
4
bits
each, and is
sent
in order beginning
with
the upper end.
Note
that
SIZ
= number of bytes in DT divided by
2.
CN
: Indicates
data
continue/
discontinue
OOH
STP : End
of
data
01H CNT : More
data
follows
( CMD
of
next packet is CDD)
The number of bytes in one exclusive packet is 256.
In
a
transmission
where the number
of
bytes exceeds one
packet,
CN
= CNT, and the continuing
data
is
transmitted
in the continuing
data
(CMD = CDD)
format.
SM : Checksum
Checksum
for
checking
data
errors.
Based on EXCLUSIVE-OR operation
from
IDC
to
CN.
·[data]
for
Tempo.
DT1
Data
LSB
DT2
Data
MSB
DT2,
DT1
: 02H,
08H-
12H,OCH
(
.J
=40-300)
Tempo
data
is
9bit
Binary ( = 101000
~
100101100)
The lower 4
bits
is expressed
as
DTl,
and the remaining
upper 5
bits
as
DT2.
DT1
is sent
first
followed by DT2.
t
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