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36
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Basic
specifications
Baud
rate
75, 110, 300, 600,
(transmission
R speed)
1.
S ynchronous
Asynchronous
system
r
]
Communication
Full
~
'
control
process
7 bit
Bit
length
'
N
O
.
P'""V
E
Z
l
10
(
SPACE
MARK")
Data
"Vle
Start of character is the first shift
-
MARK
mode.
'
ST
M
bl
l
b3
SP
CR
N
line
W
(cgmer
CR
return)
7 bit
Code
T/W
8 bit
Shake hand
Enables selection of
ER
protocol
L
level
Signal
Data line
(SD RD)logic
SPACE
(0)
MARK(1)
1200
duplex,
procedure
no
+
parity,
8 bit
parity
or
no
NONE
is
parity (parity
....
..
ODD
parity
....
..
EVEN
parity
....
..
ZERO
parity (parity
is
....
..
bits/character
(0)
bi§bzéb3:bA§b5§b
ST
SPACE.
If without Line
to
bit
start
.............
..
data bit
b-,
(LSB
—
.....
..
parity
bit
(MSB during
.............
..
stop bit
.............
..
+
LF
carrier
return
according
....
..
automatic carrier
.............
..
code
7-bit data code
...........
..
with 7-bit codes used in
Applicable
personal
computers.
code
Typewriter
...........
..
(see
38-43)
page
8-bit data code
...........
..
(8-bit expansion code)
(DC1),
Xow
line.
signal
Other control
.
.
Receiving
line
logic
ON
3 V and
+
OFF
—3Vand
l.
(Baud)
normally 1)
normally
0)
(Start Bit)
from
data,
it is
MARK
b1.)
is
8 bit
data)
LF code
to
CR
return
according
to
(see
38—43)
page
(see
43)
page
(DC3)
X orr
signals,
o r
end
voltage
greater
less
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