FUJITSU M304X - Manual (Page 77)

CHAPTER 6 RS-232-C INTERFACE
This chapter describes the RS-232-C interface used for the I/O interface
connected to the series line printer (printer). The printer conforms
with the EIA RS-232-C interface logical level and has various functions.
6.1 Operation
The basic printer functions are as follows:
Feeds forms according to Line Feed (CR), Forms Feed
and Vertical Tab (VT) codes.
Downloads the forms control buffer data from the host sent with the
Load FCB Data command.
Feeds forms as specified by the Space Line command or the Skip to Channel
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 interface buffer. The interface buffer state is transmitted to the
host by using the Reverse Channel signal or 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). A band of
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.
6 - 1