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The original had a bug that prevented this FIFO from being used. The A datasheeet newer is pin compatible with the National Semiconductor later released the A which corrected this issue. The A F version was a must-have to use modems with a data transmit rate of baud.
This generated high rates of interrupts as transfer speeds increased.
To overcome these shortcomings, the series UARTs incorporated a byte FIFO dxtasheet with a programmable interrupt trigger of 1, 4, 8, or 14 bytes. Pages using web citations with no URL.
At speeds higher than baudowners discovered that the serial ports of the computers were not able to handle a continuous flow of data without losing characters. From Wikipedia, the free encyclopedia. Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest.
The Art of Serial Communication. The current version since by Texas Instruments which bought National Semiconductor is called the D. Technical and de facto standards for wired computer buses.
Exchange of the having only a one-byte received data buffer with aand occasionally patching or setting system software to be aware of the FIFO feature of the new chip, improved the reliability and stability of high-speed connections. Dropouts occurred with Similarly numbered devices, with varying levels of compatibility with the original National Semiconductor part, are made by other manufacturers.
A Datasheet, PDF – Alldatasheet
The corrected -A version was released in by National Semiconductor. Retrieved from ” https: Views Read Edit View history.
Not all manufacturers adopted this nomenclature, however, continuing to refer to the fixed chip as a