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5

Before embedded microcontroller systems there were application specific ICs like SANYO LM8560 (alarm clock ic) and lumped logic like that used in the ROLAND CR-78 (drum machine) Once microcontrollers became economial they were embedded with a first a non-hosted application (the microcotntroller boots straight into the application code) Example pc keyboards ...


3

how (did) consumer devices used to work before they all got shipped with Linux (?) Linux was released in 1991 for x86 devices which had UARTs but now is ported to every CPU architecture from A to X which is almost everything under the Sun which followed the path of IBM's development of Unix which started in 1969. The Unix and alike history is shown below ...


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The first electronic items for consumers, with STATE maintained by digital logic, were 4_function calculators about 1975. Before that, RCA TVs used ultrasonic remote_controls to rotate the channel_selection drum, with the mechanial drum position being the "State". In a non_consumer system, there was the SAGE Strategic Air Ground Environment system, ...


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How we are able to achieve cellular data rates with respect to UART Data rates? You are not able to. But then, most MCU projects cannot really take advantage of mobile network data rates in the slightest. The information moves very quickly between the tower and the data modem, and then very slowly between the MCU and the modem. A human talking on a phone ...


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No such thing as a default pin assignment for a peripheral. You set it to the one you need.


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