Boots – shoes – and leggings
Patent
1991-08-15
1993-03-30
Heckler, Thomas M.
Boots, shoes, and leggings
364DIG2, 3649328, 3649393, 3649404, 3649427, 3649501, G06F 1300
Patent
active
051991055
ABSTRACT:
Data characters to be transferred from a peripheral device to a central processing unit are serially shifted into the receiver shift register of a universal asynchronous receiver/transmitter (UART). A multiple byte first-in-first-out memory stores a plurality of data characters received by the shift register. The UART checks the status of each data character stored in the FIFO to determine whether it will trigger an exception, A bytes till exception register indicates the number of data characters remaining in the FIFO until an exception is encountered. Then, upon request by the CPU, the UART provides the count of consecutive valid data characters from the top of the FIFO to the first exception, eliminating the need to check status on every transferred byte. Each of the multiple channels of the UART includes an Initialization Register. Setting the appropriate bit Initialization Register of any UART channel allows concurrent writes to the same selected register in each channel's register set. This function reduces initialization time for all of the common parameters that are loaded into each channel's registers. The UART implements a methodology which allows for the processing of any control characters or errors received by the UART during while internal and/or external FIFOs are being used.
REFERENCES:
patent: 4159532 (1979-06-01), Getson, Jr. et al.
patent: 4240138 (1980-12-01), Chauvel
patent: 4346440 (1982-08-01), Shikun Kyu et al.
patent: 4355354 (1982-10-01), Kempf et al.
patent: 4368512 (1983-01-01), Shikun Kyu et al.
patent: 4807112 (1989-02-01), Hamasaki
patent: 4823312 (1989-04-01), Michael et al.
patent: 4949333 (1990-08-01), Gulick et al.
Heckler Thomas M.
National Semiconductor Corporation
LandOfFree
Universal asynchronous receiver/transmitter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Universal asynchronous receiver/transmitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Universal asynchronous receiver/transmitter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1287313