Channel
A
is
synchronous, and may
be
used
for
BSC
protocol.
* Binary synchronous communication (BSC):
The
BSC
is
a character-type communication protocol, in
which a
series
of
standard control characters
are
used
for
synchronous binary data transmission between offices
for data communications.
Pin
No.
Mnemonics
Signal name
1\"
Signal direction
1
SG
Signal ground
(FG)
(Fram ground)
2
SO
Send data
OUT
3
RD
Receive data IN
4
RS
Request
to
Send
OUT
5
CS
Clear
to
send
IN
6
READY
Data Terminal Ready
OUT
(DTR)
7
SG
Signa! Ground
8
OR
Dat;set
Ready
IN
(DSR)
9
SG
Signal Ground
IN
12 ER
Equipment
Ready
OUT
!
12·3 Serial interface signal lines
Channel
A:
Usable
for
both asynchronous and synchronous
(BSC) communications.
Note:
When
interfacing one device
to
another
via
the
RS-232C interface, the transmission rate, word
length, parity
bit,
and stop
bit
on
each
device must
first
be
set
up identically. The signal lines
to
be
used
will
differ
depending on individual devices. There-
fore, the user must
have
a
full
understanding
of
the signal lines and their functions
used
for
the
interface.
Input/output
signal pin functions
Table
29
Description
*1
Data sent
by
the
MZ-5500
Data received
by
the
MZ-5500
In
CP/M-86
or
BOOS: Always
off.
,In
BASIC: On during data send
-
Turned
off
at
the
end
of
data send.
Response
to
Request
to
Send:
If
this signal
is
on, the system
sends
data.
If
it
is
off,
the system
stops data send.
Note:
Up
to
two
bytes
of
data may
be
sent after the
CS
is
turned
off.
Indicates whether
or
not
the system
is
ready
for
data reception:
READY
is
on
if
the system
is
ready.
READY
is
off
if
the
system
is
not
ready.
*1
I ndicates whether
or
not
the remote device
is
ready
for
operation.
On
if
the remote device
is
ready
for
data send/receive.
Off
if
the remote device
is
not
ready
for
data send/receive.
If
this signal
is
turned
off
during data send/receive operation,
an
error
will
result.
*2
*1
Always on
as
long
as
the system power
is
on.
While the
MZ-5600
system
has
the
following
additional signal lines,
they
are
not
supported
in
the CP/M-B6FDOS
or
BASIC (only channel A).
10 CD
Carrier
Detect
IN
I ndicates the remote device
is
a sending carrier.
11
Cl Call Indication
IN
Indicates a
termination
call
has
arrived
from
the line.
13
STl
Transmitter
Signal
element,
OUT
Outputs a send
Signal
element
timing
information
for
synchronous
timing
communications. (DTE source)
14
RT
Receiver
Signal
element
timing
IN
Inputs
receiver signal element
timing
for
synchronous communi-
cations.
(DCE source)
15
ST2
Transmitter
signal element
IN
Outputs
(from
device) send
Signal
element
timing
for
synchronous
timing
communications. (DCE source)
*1.
Pins 1, 7, and 9
are
signal grounds.
*2.
The
CS
and
OR
pin
functions
may
be
disabled.
For
more details
see
the description
of
the RSPARM and 10CNF in the CP/M-B6
User's Manual.
*3.
For
the
details
of
the
CD,
Cl,
ST1,
RT,
and ST2,
see
the Owner's Manual.
-49-
To Next Page
Loading...
Need help?
General
