HP 13255 Technical Information page 27

13255
General Purpose Asynchronous Data Comm Module
23255-91089/25
Rev AUG-Ot-16
4.2 SPLIT BAUD RATE STRAPPING.
Baud rate selection is controlled bY bits
1, 2,
and
~
of the control
~@qister
and the S9-S2 $witches. Bits
1, 2, ~nd 3
of the
c~ntrol
req-
is~er, In con1unctiQn with the
134
and
CBE
switches, determine the re-
ceive baud rate.
If the SO-52 Switches are all open the transmit baud
rate will always be equal to the receive baud rate. The followinq
chait shows the available
s~lit
rates and corresponding switch configu-
rations.
R
E
C
E
t
V
E
B
A
"
D
R
A
T
F,
TRANSMIT
~AUD
RATE
r
tJ
S
E
T i l
X 0 1 5
T MOO
1
3 2
o
0
o
0
2 4
4 8
o
0
o
0
9
6
o
o
EXT X X X X X X X X
CUSTOM
110
150
300
1200
2400
4800
9600
1.34.5
x
X X X X X X
x
X X X X X X X
X X X X X X X
X X X X X X X
X X X X X X X
X X X X X X X
X X X X X X X
X X X X X X X
1
3
4
5
x
52 SO
se
SO
se se
SO SO SO
5e
SO
51
SO
se
59
SO SO
se
SC
so
SC
so
so so se so se
50 SC SO SC SO SO
x =
Av~ilable
SplIt Rate
5e
=
Switch Closed
SO
=
SwitCh Open
B B B
I I I
T T T
321
000
o
0 0 CBF. Switch
Closed
001
010
011
100
101
1 1 0
111
010
134
Switch
Closed
Note: a) If all SO-52 Switches
ar~
open, the transmit baud
rate wIll p-qual the receive baud rate.
b) The
134
SwitCh must be closed to Qet
134.5
baud.
c) The CBF switch must be closed to Qet a custom baud
rate.