Impulse SIO-104+2 (3502) Manual de usuario descargar pdf (Pagina 10)

Technical Description

Sealevel Systems SIO-104+2 Page 8

Technical Description

The SIO-104+2 series provides the ultimate serial connection for your PC/104 application. SIO-104+2 utilizes the

16850 UART. These chip features programmable baud rates, data format, interrupt control and 128 Byte input and

output FIFOs.

The SIO-104+2 when configured with the RS-422/485 interface will allow long length, high-speed communications

suitable for data collection and shop floor control.

The SIO-104+2 when configured with the RS-232C interface, is fully compatible with the DOS operating system,

all popular modem software, network operating systems software, and mouse drivers.

Features

• Selectable interrupts (IRQs) 3, 4, 5, 7, 9, 10, 11, 12, 15

• Multiple adapters can share the same IRQ

• Uses PC/104 compatible stack through connector for universal mounting

• 5 volt only DC operation

Connector Pin Assignments

RS-232

Signal Name J1/J2 DB-9 Mode

GND Ground 9 5

TD Transmit Data 5 3 Output

RTS Request To Send 4 7 Output

DTR Data Terminal Ready 7 4 Output

RD Receive Data 3 2 Input

CTS Clear To Send 6 8 Input

DSR Data Set Ready 2 6 Input

CD Carrier Detect 1 1 Input

RI Ring Indicator 8 9 Input

Note: These assignments meet EIA/TIA/ANSI-574 DTE for DB-9 type connectors.

RS-422/485

Signal Name Pin # Mode

GND Ground 9 5

TX + Transmit Data Positive 7 4 Output

TX- Transmit Data Negative 5 3 Output

RTS+ Request to Send Positive 2 6 Output

RTS- Request to Send Negative 4 7 Output

RX+ Receive Data Positive 1 1 Input

RX- Receive Data Negative 3 2 Input

CTS+ Clear to Send Positive 8 9 Input

CTS- Clear to Send Negative 6 8 Input

Technical Note: Please terminate any control signals that are not going to be used. The most common way to do this

is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help

insure you get the best performance from your adapter.

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Impulse SIO-104+2 (3502) Manual de usuario Pagina 10