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Word Length
Parity
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I/O
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5- B IT
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PICTORIAL 2.I5
BAUD
RATE
Pictorial
2-14
shows
the
jumper
wire configuration
for
each ofthe five
preset
baud rates
(600
to
9600).
The
baud
rate
that
you
select appears
on the
Baud Rate
switch, SWz, on the back
panel
on
the Terminal. This
lets
you
select one of two baud rates, 300 baud
or
the
rate that
you programmed
on the I/O circuit board.
NOTE:
For baud rates
greater
than
600,
refer
to
Detail
2-14A
and move the
green
harness wire
on
switch
SW2
lug
3
to lug 2. Be
sure to solder this connection.
woRD
LENGTH
(N1,
N2)
The number of bits
per
word is determined by
the N1
and Nz inputs
(pins
37
and
sa) to the UART.
The
word length may be
programmed
for
5-,
6-,
7-,
or
8-bits as shown below.
WORD LENGTH N2
(pin
38)
N1
(pin
37)
0
1,
0
1
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NO PARITY
PARITY
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BOARD
6-BIT
WORD
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PICTORIAL
2.16
The Terminal
was
initially
wired for
an
8-bit
word.
You can, however,
change the word length to suit
your particular
application. To
do
this, remove
the
wires
from
the holes labeled N1
and
N2
on the I/O
circuit board. Then install wires to
correspond to the
word length
you
desire. Pictorial 2-15
shows how to
connect
jumper
wires to
select a 5-, 6-,
7-,
or 8-bit
word. The four holes directly above the
ground
sym-
bol
($
connect to
ground
(logic
0). The four holes
directly above the
plus
symbol
(*)
connect
to the
+s-volt
supply
(logic
1).
PARTTY
(P)
The UART
(IC612)
can
be
programmed
to either
gen-
erate a
parity
bit for the serial
output or to eliminate
the
parity
bit. A logic
1
on
the P input
(pin
35) to the
UART eliminates
the
parity
bit from the transmitted
or
received
word.
The stop bit
(s)
will immediately
follow the last data
bit. A logic 0 on
the P input causes
the UART
to
generate
a
parity
bit.
The Terminal
was
initially wired for no
parity.
See
Pictorial 2-16
(Illustration
Booklet, Page
5).
This oc-
curs when a wire is connected between
holes P and +
on the I/O circuit board. The
parity
bit is
not used
with
the H9 system. However, if
your
own special applica-
tion
requires the
parity
bit,
connect
a wire between
holesPand
*.
8-BIT
WORD
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