Serial Portion
of
the
Card
The serial portion
of
the HP24540A provides asynchronous
communications at
RS-232C
levels.
Other features include: a
programmable baud rate
of
75
to
19200
bps,
character length
of
5,
6,
7,
or
8 bits, a stop bit
of
1,
1 1/2, or
2,
a parity bit, modem
control signals, full double buffering, and automatic adding or
deletion
of
start, stop, and parity bits.
Serial
Jumpers
There
is
one serial jumper block on the HP24540A card. The
physical jumper block represents
two
jumpers.
The
address select
depends on the jumper configuration.
This
jumper
can
also
be
configured
to
inhibit the serial port.
The
following diagram shows
the port selection by placing a jumper
cap
over the appropriate
pins.
J1
Configurations
Jl
PORT 1
SELECT
PORT 2
SELECT
Figure 27
DISABLE
122
Serial/Parallel Card
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