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CHAPTER
6
RS-232-C
This chapter describes the RS-232-C interface used for the I/O interface
connected to the M304x
with the EIA RS-232-C interface logical level and has various functions.
6.1 Operation Outline
The basic printer functions are as follows:
Load FCB Data command.
The printer receives serial data transmitted from the host, assembles it in to
'I-bit or 8-bit data, checks for even, odd, or no parity, and writes the data in
the 2K-byte
interface buffer.
host by using the Reverse Channel signal (SCA or SRS) or the XON/XOFF code.
Asynchronous data consists of a start bit, 7 or 8 data bits, a parity bit
(unless no parity), and 1, 1.5, or 2 stop bits (Teletype procedure).
2.4, 4.8, 9.6 or 19.2 K can be set for the printer.
Figure 6.1 shows the basic configuration of the RS-232-C interface circuit.
INTERFACE
series line printer (printer).
The interface buffer state is transmitted to the
The
printer
conforms
(CR), Forms Feed
A band of
6 -1
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