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NS16550A Datasheet - National Semiconductor

NS16550A_National.pdf

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Datasheet Details

Part number:

NS16550A

Manufacturer:

National Semiconductor

File Size:

211.82 KB

Description:

Uart.

NS16550A, UART

Files (ADFs) These files each have an I D number that associates each ADF with the matching adapter card I D number The ADF contains specific information used by the operator during system configuration such as the adapter card name the system resources the adapter can use and help information It in

www.DataSheet4U.com Accessing the NS16550A UART in the PS 2 Model 50 60 70 and 80 Accessing the NS16550A UART in the PS 2 Model 50 60 70 and 80 INTRODUCTION This paper reviews fundamental concepts of the Micro Channel Architecture and their relation to the NS16550A UART All 4 of the PS 2 personal computers reviewed use the NS16550A for asynchronous serial communication The first part is an overview of the PS 2 system board and Micro Channel Architecture (MCA) in the Models 50 60 70 and 80 pers

NS16550A Features

* regardless of the data bus width One of these is a centralized arbitration controller that allows up to 16 devices to contend for the 8 available DMA channels These devices compete based on an assigned priority level for the DMA resource A ‘‘fairness’’ option allows lower priority devices to compete

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