Impulse 3088 Instrukcja Użytkownika Pobierz pdf (Strona 10)

Technical Description

Sealevel Systems DUOCOM: Page 7

Technical Description

The DUOCOM: utilizes the 16550 UART. This chip features programmable

baud rate, data format, interrupt control and a 16 byte input and output FIFO.

Also available as an option is the 16C650 UART that provides a deeper FIFO

(32 bytes) and enhanced clocking features.

Features

• Addressable as COM1: - COM4: and other selectable address combinations.

• ‘Shareable’ IRQs allow more than one port to share a single IRQ.

• IRQs 2-5, 7, 10, 11, 12, 15 supported.

Connector Pin Assignments (DB9 Male)

Name Pin # Mode

TD Transmit Data 3 Output

RTS Request To Send 7 Output

DTR Data Term Ready 4 Output

GND Ground 5

RD Receive Data 2 Input

DCD Data Carrier Detect 1 Input

DSR Data Set Ready 6 Input

CTS Clear To Send 8 Input

RI Ring Indicator 9 Input

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

connectors.

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 3088 Instrukcja Użytkownika Strona 10