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I,
10. RS232C interface
Two channels of RS232C interface are provided standard for the MZ-5500 aIld
MZ-5600 in order to permit aserial data transfer with a variety of
peripheral devices.
The RS232C is the standards set forth by EIA
(Electronic Industries Association of the U.S.A.) for
interfacing
the modem
(modulator/demodulator) with the communication control device, and seriR]
binary dlgital da ta signals, control signals, and timing signals transferred
between the modem and the data terminal.
The RS232C interface of the MZ-5500/5600 has been designed in compliance wi th
these EIA requirements to make connection with the acoustic coupler,
printer, plotter, etc.
However; attention must be paid to it that even the
device that has the interface that conforms to the RS232C requirements may
not be connected satisfactorily depending on the case.
10-1. Specification
Input/output method
RS232C bit serial input/output
Channels
2 channels
Channel A (BSC conforming)*
Chanriel B
Code used
JIS 7-channel code system
J1S 8-channel code system
Baud rate
110, 150, 200, 300, 600, 1200, 2400, 4800,
9600 BPS
Transmission rnethod
Half-duplex (Channel A and B)
Transmission control procedure
Non-procedure
Data format
l
stop bit
Parity option of
.
even, odd, and non parity
Signal level
High: +5 to
+ISV
Low: -5 to
-ISV
*BSC
BSC is a short words for Binary Synchronous Communication which means thp.
binary data synchronous data cornmunication.
It is
the·
charncter type
protocol for which aseries of standard control characters <lud
control characters are used for the synchronous binary data transmissi0n
between two stations of the data communication system.
Though the
following signals are provided in the hardware
f~)[
the synchronous
transmission, they are not supported by CP/M-86, MS-DOS, and
RASle.
*Since the Z-80 S10 is used for the serial interface, the specific<ltion of
that LSl is attached at the end of this text.
b1
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