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National Stock Number:
7025-01-426-2279
Federal Supply Class:
7025
National Item Identification Number:
014262279
Description:
SYNCHRONOUS SERIAL COMMUNICATION
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Manufacturer Information:
| SCB-1020 | 2Z052 | QUA TECH INC |
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Techincal Specification:
| GENERAL CHARACTERISTICS ITEM DESCRIPTION | THE SCB-1020 IS AN ASYNCHRONOUS/SYNCHRONOUS CONNUICATION CARD. IT CONTAINS THE UPD7201A MULTI-PROTOCOL SERIAL COMMUNICATIN CONTROLLER TO PERFORM DATA TRANSFER UP TO 256 KBAUD. THE SCB-1020 SUPPORTS ASYNCHRONOUS BIT AND BYTLE ORIENTED PROTOCOLS. THE SYNCHRONOUS PROTOCOLS MAY BE APPLIED TO MONOSYNC AND BISYNC AS WELL AS HDLC AND SDLC OPERTION. THE RS-232 SIGNALS ARE INTERFACED TO EXTERNAL DEVIVE VIA A D-25 CONNECTORWHICH PROVIDES SHIELDING AGAINST ENVIRONMENTAL NOISE.OTHER CHARACTERISTICS OF THE SCB-1020 INCLUDE JUMPER SELECTABLE DMA REQUEST (CHANNELS 1 &3) AND JUMPER SELECTABLE INTERRUPT REQUESTS (IRQ2-IRQ70). THE SCB-1020 CONTAINS SWITCH SELECTABLE ADDRESSING TO AVOID CONFLICTS WITH OTHER DEVICES IN THE COMPUTER. PROGRAMMABLE ON-BOARD CLOCKS PROVIDE DATA RATES FOR THE UPD7201A |
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