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Epson C82305 Series User Manual

Serial interface card
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Serial Interface



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  • Page 1 EPSON Serial Interface Card C82305* C8230* English Deutsch Français ESpañol Italiano 4000152 C01-00...
  • Page 2 All efforts have been made to ensure the accuracy of this manual. However, should any error be detected. Seiko Epson would greatly appreciate being informed of them The above notwithstanding. Seiko Epson can assume no responsibility for any errors in this manual or their consequences. Copyright © 1990 by- Seiko Epson Corporation. Nagano, Japan...
  • Page 3 Serial Interface C82305 * /C82306 * Schnittstellenkarte C82305 * /C82306 * Interface série C82305 * /C82306* Interface en serie C82305 * /C82306* Interfaccia seriale C82305* /C82306* English Deutsch Français Español Italiano...
  • Page 4: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION About this guide SETTING THE CONDITIONS Card layout DIP switch and jumper settings DIP switches Jumpers DATA ENTRY Serial communication About data entry Handshaking protocol SPECIFICATIONS HARDWARE DESCRIPTION RECOMMENDED CIRCUIT CONNECTIONS INSTALLATION...
  • Page 5: Introduction

    The Serial Interface Card 032305 * /C82306 * is an interface that allows asynchronous serial data communication between a host computer and an EPSON printer. This interface card offers the following features: • Data transmission that can be set at either RS-232D or 20 mA Current Loop levels (RS-232D has been revised from the former RS-232C.
  • Page 6: About This Guide

    Also included are instructions on how to adjust the settings of the C82305 * /C82306 * interface card, as well as a general description of serial data communication. The C82305 * /C82306 * option package contains the...
  • Page 7: Setting The Conditions

    DIP (Dual In-line Package) switches, and seven jumpers. These switches and jumpers are used for selecting various interface operations. Card layout The figure below shows the layout of the C82305 * /C82306 * card, and the locations of the DIP switches and jumpers. Figure 1. Card layout...
  • Page 8: Dip Switch And Jumper Settings

    DIP switch and jumper settings Before you install the C82305 * /C82306 * interface, you may need to adjust the DIP switch 2 and jumper settings. You can change the DIP switch 1 settings after you install the interface. When making DIP switch setting changes, it is best to use a pointed device, such as a ball-point pen or small screwdriver.
  • Page 9 DIP switch 1 (interface operations) The table below contains information on switch functions, and the factory setting of each. Table 1. DIP switch 1 Switch Function number I/F card enable/disable (Note) Word length l - 2 Parity check 1 Parity check 2 Baud rate 1 Baud rate 2 Note...
  • Page 10 DIP switch 2 (interface operations) The table below contains information on switch functions, and the factory setting of each. Table 2. Data word structure The data word structure is also operator selectable through DIP switch settings (See Table 1). The word structure for serial data is: 1 start bit +7 or 8 data bits (selectable) + 1 parity bit (selectable) +1 or more stop bits.
  • Page 11 The table below shows the possible word structure combinations. Table 3. Word structure You can select the parity check method by DIP switch settings. (See Table 4.) Table 4. Parity check Note Since the selection of parity check depends on your type of printer, refer to your printer’s manual for details.
  • Page 12 Baud rate selection In serial data communication, data is transmitted in the form of bits. These data bits go out one at a time along a single path, and in a specified order. The BPS (Bits Per Second) rate, or speed at which these bits are transmitted, can be selected using a combination of DIP switch settings.
  • Page 13: Jumpers

    Note • The printer will assume a setting of 1,200 BPS for switch combinations other than those shown above. • Since the maximum transmission speed (baud rate) depends on your type of printer, refer to your printer’s manual for details. Jumpers The jumper is a small terminal used for connecting or disconnecting a circuit.
  • Page 14 Jumper settings Table 6. shows information about the interface conditions that can be selected using jumpers. In all cases, ON denotes the connection of the jumper (covering both terminals), while OFF denotes the disconnection of the jumper. Table 6. Jumper settings Note If the host computer is not equipped with a power supply for the Current Loop interface, these jumpers...
  • Page 15 Table 7. Flag polarity selection Jumper JNOR ON: MARK (do not accept data)= JREV Note Either the JNOR or JREV jumper must be connected. Function MARK (do not accept data) = Current ON Negative EIA level MARK (do not accept data) = Current OFF MARK (do not accept data)= Positive EIA level...
  • Page 16: Data Entry

    To prevent such data loss, special handshaking protocols are provided to regulate the flow of data transmission. The two protocols available on the C82305 * /C82306 * interface card are DTR and X-on/X-off. Note When a parity error (if parity check is enabled), framing error, or overrun error is detected in the data received, data is ignored or an asterisk (*) is printed instead.
  • Page 17: Handshaking Protocol

    The C82305* /C82306* interface card sends an X-on < 11 code when it is ready to receive data, and >...
  • Page 18 • Transmit timing of X-on signal The X-on signal is transmitted when the power is first turned on, or when the vacant area in the buffer is greater than the specified value (typically 512 bytes; refer to your printer manual). Figure 3.
  • Page 19 With the status flag set, and data reception prohibited, the vacant area of the buffer gradually increases as the printer continues to print. When the vacant area in the buffer reaches the specified value (typically 512 bytes; refer to your printer manual), the flag is reset and data entry is again enabled.
  • Page 20: Specifications

    SPECIFICATIONS 1. Synchronization: Asynchronous 2. Baud Rate: 75, 110, 134.5, 150, 200, 300, 600, 1,200, 1,800, 2,400, 4,800, 9,600, or 19,200 BPS (selectable) 3. Word length: Start bit: 1 bit Data bit: 7 or 8 bits (selectable) Parity bit: Odd, even, none, or ignore (selectable) Stop bit: 1 bit or more 4.
  • Page 21 5. Handshaking Table 8. Handshaking Using DTR protocol Using X-ON/X-OFF protocol The DTR signal is always set to SPACE while X-on/ X-off handshaking is selected. X-on/X-off characters will not be transmitted from TXD while DTR handshaking is selected (TXD signal is always set to MARK).
  • Page 22: Hardware Description

    HARDWARE DESCRIPTION 1. I/F board connector: EIA standard 25-pin D-SUB female connector. 2. For signal description and pin assignment, refer to the table below: Table 9. Signal Description and Pin Assignment Pin No. Signal name protective Ground Transmitted Data (TXD) Received Data (RXD) Request to...
  • Page 23 Pin No. Signal Name TTY-TXD T T F T X D Return T T Y _ R X D R e t u r n Note • The column heading “Direction” refers to the direction of signal flow as viewed from the printer. •...
  • Page 24: Recommended Circuit Connections

    RECOMMENDED CIRCUIT CONNECTIONS Recommended line driver and line receiver for RS-232D signal level settings. (As viewed from the host computer.) Figure 4. RS-232D Line Receiver Recommended line interface circuit for 20mA Current Loop signal level settings. (As viewed from the host computer.) Figure 5.
  • Page 25: Installation

    INSTALLATION The C82305* /C82306* interface card is designed to be installed inside the printer. Installation or removal of the interface board is easy, and requires only a screwdriver. The following section gives you detailed information on how to install your interface card in a variety of EPSON printers.
  • Page 26 2. Fit both sides of this interface card into the guides inside the compartment. 3. Insert this interface card until the interface pins mate with the connector inside your printer. 4. Secure the interface with the two screws.
  • Page 27 Current-Loop Transmitter/Receiver Circuit Diagrams Set the Jumper Jl, J2, J3, and J4 referring to the following diagrams. Transmitter Circuit Diagram...
  • Page 28 Receiver Circuit Diagram...
  • Page 29 EPSON UK LTD. campus 100. Maylands Avenue. Hemel, Hempstead. Herts. HP2 7EZ, UK Phone: 442-61144 Telex: 5182467 EPSON AUSTRALIA PTY. LTD. Unit 3, 17 Rodborough Road. Frenchs Forest NSW 2086 Australia Phone: (2) 452-0666 Fax (2) 975-1409 EPSON HONG KONG LTD.

This manual is also suitable for:

C8230 seriesC82305/06 (serial i/f