commit e42495ab11f7b0069086674f9f803089a52c5827 Author: edwardgnj5450 Date: Thu Oct 23 11:28:08 2025 +0000 Update 'As Soon as the Memory has Been Programmed' diff --git a/As-Soon-as-the-Memory-has-Been-Programmed.md b/As-Soon-as-the-Memory-has-Been-Programmed.md new file mode 100644 index 0000000..646439e --- /dev/null +++ b/As-Soon-as-the-Memory-has-Been-Programmed.md @@ -0,0 +1,7 @@ +
A programmable learn-solely memory (PROM) is a type of digital memory where the contents could be modified once after manufacture of the system. The info is then permanent. It is one type of learn-solely memory (ROM). PROMs are usually utilized in digital digital gadgets to store low stage programs equivalent to firmware or microcode. PROMs could also be used during development of a system that will finally be converted to ROMs in a mass produced version. These types of reminiscences are utilized in microcontrollers, video recreation consoles, cell phones, radio-frequency identification (RFID) tags, implantable medical devices, excessive-definition multimedia interfaces (HDMI), and in lots of different consumer and automotive products. PROMs are manufactured clean and, depending on the technology, may be programmed at the wafer, closing test, or system stage. Clean PROM chips are programmed by plugging them into a machine known as a PROM programmer. A typical PROM machine has an array of memory cells.
[bandcamp.com](https://wearehospital.bandcamp.com/album/memory-waves-lp) + +
The bipolar transistors in the cells have an emitter that is related to a fuse referred to as a polyfuse. To program a PROM is to strategically blow the polyfuses. The PROM was invented in 1956 by Wen Tsing Chow, working for the Arma Division of the American Bosch Arma Company in Garden City, New York. The invention was conceived on the request of the United States Air Pressure to come up with a extra versatile and secure way of storing the targeting constants in the Atlas E/F ICBM's airborne digital computer. The patent and associated know-how had been held under secrecy order for several years while the Atlas E/F was the main operational missile of the United States ICBM drive. The term burn, referring to the strategy of programming a PROM, can be in the original patent, as one in every of the unique implementations was to literally burn the internal whiskers of diodes with a current overload to supply a circuit discontinuity. The first PROM programming machines had been additionally developed by Arma engineers underneath Chow's direction and were positioned in Arma's Garden City lab and Air Force Strategic Air Command (SAC) headquarters.
+ +
OTP (one time programmable) memory is a special type of non-volatile memory (NVM) that permits information to be written to memory only once. As soon as the memory has been programmed, it retains its value upon loss of energy (i.e., is non-unstable). OTP memory is used in applications the place dependable and repeatable studying of knowledge is required. Examples include boot code, [MemoryWave Community](http://9dnakedeye.com.cn:9001/charlottereade) encryption keys and configuration parameters for analog, sensor or display circuitry. OTP NVM is characterized, over different sorts of NVM like eFuse or EEPROM, by providing a low energy, small space footprint memory construction. As such, OTP memory finds software in products from microprocessors & show drivers to energy management ICs (PMICs). Commercially out there semiconductor antifuse-based OTP memory arrays have been round no less than since 1969, with initial antifuse bit cells dependent on blowing a capacitor between crossing conductive strains. Early oxide breakdown applied sciences exhibited a wide range of scaling, programming, dimension and manufacturing issues that prevented volume production of memory gadgets based mostly on these applied sciences.
+ +
Another type of 1-time programmable memory system uses the identical semiconductor chip as an ultraviolet-erasable programmable read-solely memory (UV-EPROM), however the finished gadget is put into an opaque bundle, instead of the expensive ceramic package deal with clear quartz window required for erasing. These devices are programmed with the same strategies as the UV EPROM parts but are much less pricey. Embedded controllers could also be available in both field-erasable and one-time styles, permitting a value saving in volume production without the expense and lead time of manufacturing unit-programmed mask ROM chips. Although antifuse-based PROM has been accessible for Memory Wave many years, it wasn’t available in standard CMOS until 2001 when Kilopass Know-how Inc. patented 1T, 2T, and 3.5T antifuse bit cell applied sciences utilizing an ordinary CMOS process, enabling integration of PROM into logic CMOS chips. The first process node antifuse can be carried out in customary CMOS is 0.18 um. Because the gate oxide breakdown is less than the junction breakdown, particular diffusion steps were not required to create the antifuse programming factor.
\ No newline at end of file