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Topic: EEPROM

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Flash memory

EPROM

Computer memory

NRAM

Memory Stick

Programmable logic device

PIC16F84

Dynamic random access memory

Primary storage

SDRAM

SRAM

Static random access memory

RDRAM

DDR SDRAM

Random access memory

	EEPROM Definition: TechEncyclopedia from TechWeb
		EEPROMs use a transistor with a floating gate underneath a control gate.
		EEPROMs have a lifespan of between 10K and 100K write cycles, which is considerably greater than the EPROMs (single "E") that preceded them.
		A single EEPROM bit is made up of two transistors: the MOS transistor for erasure and the floating gate transistor for storage.
	www.techweb.com /encyclopedia/defineterm.jhtml?term=EEPROM (471 words)

	EEPROM - Wikipedia, the free encyclopedia
		Serial EEPROMs come in a range of capacities from a few bytes to over 128 kilobytes and are typically used to store configuration parameters, and in modern computers they replace the hitherto CMOS nonvolatile BIOS memory.
		Also, RAM is generally a lot faster to write than EEPROM (typically a few nanoseconds as opposed to a few microseconds), and most types of RAM are volatile (they lose their contents when power is removed).
		EEPROM takes more die area than flash memory for the same capacity because each cell usually needs both a read, write and erase transistor where in flash memory the erase circuits are shared by blocks of many (often 512×8) cells.
	en.wikipedia.org /wiki/EEPROM (596 words)

	What is EEPROM? - A Word Definition From the Webopedia Computer Dictionary
		EEPROM is a special type of PROM that can be erased by exposing it to an electrical charge.
		EEPROM is similar to flash memory (sometimes called flash EEPROM).
		The principal difference is that EEPROM requires data to be written or erased one byte at a time whereas flash memory allows data to be written or erased in blocks.
	www.webopedia.com /TERM/M/EEPROM.html (437 words)

	Howstuffworks "How ROM Works"
		EEPROMs are changed 1 byte at a time, which makes them versatile but slow.
		In fact, EEPROM chips are too slow to use in many products that make quick changes to the data stored on the chip.
		Manufacturers responded to this limitation with Flash memory, a type of EEPROM that uses in-circuit wiring to erase by applying an electrical field to the entire chip or to predetermined sections of the chip called blocks.
	computer.howstuffworks.com /rom5.htm (273 words)

	EEPROM - Webopedia.com (Site not responding. Last check: 2007-10-26)
		EEPROM is a special type of PROM that can be erased by exposing it to an electrical charge.
		EEPROM is similar to flash memory (sometimes called flash EEPROM).
		The principal difference is that EEPROM requires data to be written or erased one byte at a time whereas flash memory allows data to be written or erased in blocks.
	systems.webopedia.com /TERM/M/EEPROM.html (115 words)

	EEPROM - Electrically Erasable Programmable Read Only Memory
		EEPROMs differ from DRAMs in that the memory stays in even if electrical power is lost.
		EEPROM can be erased and reprogrammed within the computer or externally.
		EEPROM is frequently used for system-board BIOSes so that a computer's BIOS can be updated just like a piece of software.
	www.auditmypc.com /acronym/EEPROM.asp (542 words)

	Serial EEPROM
		Of particular interest to us are the EEPROM Array, which is the actual EEPROM memory cells, the Status Register, which is a register that holds configuration and status information, and of course the Page Latches, which are the temporary 'holding' areas for data being written.
		EEPROM is not a substitute for general purpose RAM.
		The basic operation of the SPI based EEPROM's is to lower the CS line, send a command, such as WRITE, followed by an address and the data, then raise the CS line.
	www.seattlerobotics.org /encoder/aug99/serialeeprom.html (2283 words)

	EEPROM: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-26)
		Flash memory is a form of eeprom that allows multiple memory locations to be erased or written in one programming operation....
		EEPROM takes more die area than flash memory for the same capacity because each cell usually needs both a read and a write transistor transistor quick summary:
		The transistor is a solid state semiconductor device which can be used for amplification, switching, voltage stabilisation, signal modulation and many other...
	www.absoluteastronomy.com /encyclopedia/e/ee/eeprom5.htm (281 words)

	Technorati Tag: eeprom
		EEPROM Find microchip semis and more huge selection shipped to you today.
		Eeprom Specialists Electronic Components is an independent stocking distributor/wholesaler of board level electronic parts.
		Looking for eeproms, check stock on-line Stock-Point is now franchised for the Xicor eeprom line.
	technorati.com /tag/eeprom (299 words)

	Eeprom Rs232 (Site not responding. Last check: 2007-10-26)
		Flat RJ phone-style cables eeprom rs232 may be used with special eeprom rs232.
		A hardware loopback is eeprom rs232 simply a wire connecting complementary pins together in the.
		eeprom rs232 Again, data is changed eeprom rs232 when the clock transitions from OFF to.
	rs232.berh.be /eeprom-rs232.html (1264 words)

	What is EEPROM? - a definition from Whatis.com - see also: electrically erasable programmable ROM
		Unlike EPROM chips, EEPROMs do not need to be removed from the computer to be modified.
		In an EEPROM that is frequently reprogrammed while the computer is in use, the life of the EEPROM can be an important design consideration.
		A special form of EEPROM is flash memory, which uses normal PC voltages for erasure and reprogramming.
	whatis.techtarget.com /definition/0,,sid9_gci213928,00.html (227 words)

	Sci.Electronics.Repair FAQ: RCA/GE TV (CTC175-187+) Solder Connection and EEPROM Problems
		In many cases, while the contents of the EEPROM have been corrupted by write errors caused by bad solder connections, the actual chip is undamaged and really does not need to be replaced.
		If the rest of the EEPROM data is OK or can be corrected by the on screen menu then this procedure will save the replacement cost of the EEPROM (less than $5.00 wholesale) and the tedious job of performing about 100 alignments to the tuning system which is REQUIRED after EEPROM replacement.
		The trick is that some of the values in the EEPROM are sent to the micro when the set is plugged in, and others when the set is turned on.
	repairfaq.ece.drexel.edu /REPAIR/F_rcatune.html (16206 words)

	EEPROM Programming
		The SS-ST68 contains 128 EEPROM memory locations from which 121 are meant to be used by the user as general purpose memory.
		Starting Speed (EEPROM Address 5 and 6): This word parameter (16 bits) specifies how fast the stepper starts to move when the Turn CW Speed or Turn CCW Speed commands are sent with the acceleration option enabled.
		There will be instances in which the configuration bytes on EEPROM will be unknown and hence this will be the only way to gain access to the board resources.
	superstepper.com /SS-Labs/EEPROM_Programming/eeprom_programming.html (1227 words)

	Interfacing a PIC with a Microchip 24LC65 8K X 8 EEPROM
		Dedicating an EEPROM to avoid performing such functions as sin(x) or ln(x) may seem extravagant, but the cost of this device is but $3.50.
		Data may later be retrieved from EEPROM and written to the data buffer for either display or serial transfer to a PC.
		A sequential write is the same command sequence as a write, except that after sending the EEPROM high and low addresses, the data bytes are send in sequence with a nack after each byte.
	www.phanderson.com /PIC/16C84/24lc65.html (1165 words)

	Using the 8051 EEPROM (Site not responding. Last check: 2007-10-26)
		The bits go from Bit 7 on the left to Bit 0 on the right, before the B which signifies that this is a binary number.
		Then we move the address to the data pointer, move the data value to the accumulator (A) and write to the EEPROM using the MOVX command.
		We simply move the address to the data pointer, read from the EEPROM using the MOVX command, and transfer the byte that was read to the DATAIN variable.
	www.iguanalabs.com /eeprom.htm (755 words)

	PCR1000 EEPROM corruption FAQ. (Site not responding. Last check: 2007-10-26)
		The EEPROM, or Electrically Erasable Programmable Read Only Memory, it is a form of memory that is supposed to remember data without being powered like a ROM, but also capable of being written to.
		The EEPROM in the PCR1000 is located on the logic PCB, directly underneath the mask programmed Hitachi Processor.
		The cause of the reported EEPROM corruption is not known.
	www.mahy.demon.co.uk /faq/epfaq.htm (679 words)

	EEPROM at opensource encyclopedia (Site not responding. Last check: 2007-10-26)
		An EEPROM, or Electrically-Erasable Programmable Read-Only Memory, is a non-volatile storage chip used in computers and other devices.
		Unlike an EPROM, an EEPROM can be programmed and erased multiple times electrically.
		EEPROM takes more die area than flash memory for the same capacity because each cell usually needs both a read and a write transistor where flash memory needs only one.
	www.wiki.tatet.com /EEPROM.html (149 words)

	ST \| Memory Chip Combines FLASH and EEPROM \| P340M
		SGS-THOMSON, the world's number one supplier of EEPROM memories, has announced the availability of the M39432, a product that combines a 4Mbit FLASH memory and a 256Kbit parallel EEPROM memory on the same chip.
		Because both memory functions are implemented in the same technology, much of the support circuitry that would be duplicated in discrete flash and EEPROM devices, including charge pumps for on-chip generation of the programming voltage, address logic, state machine and I/O buffers, is shared.
		Because the EEPROM block manages its write cycle internally once the host controller has issued the Program command, the host controller can read the flash memory while an EEPROM write cycle is in progress.
	www.st.com /stonline/press/news/year1997/p340m.htm (357 words)

	Parallel Port - Programming Serial EEPROM 93C56
		The ne xt two, three or four bits are used by the EEPROM to determine the nature of the operation.
		For commands involving either an erase or a write, the CS is brought momentarily low and the EEPROM output DO is monitored until it assumes a logic one, indicating the EEPROM has completed the operation.
		This might be useful in interfacing with a STAMP or similar, in applications where messages are displayed either on a terminal or on an LCD display.
	www.phanderson.com /printer/eeprom/eeprom.html (1287 words)

	Microcontroller EEPROM corruption, myth and reality. (Site not responding. Last check: 2007-10-26)
		By EEPROM, I mean memory within the micro, that is held without power, indefinitely, and is re-writable under program control.
		Much of this is also applicable to external EEPROM chips, but there are several versions of terminology out there.
		I have caused an Atmel AVR to corrupt the EEPROM by 'glitching' the xtal with a screwdriver.
	www.dvanhorn.org /Micros/All/Eeprom.php (668 words)

	RCA/GE TV (CTC175-187+) Solder Connection and EEPROM Problems
		In many cases, while the contents of the EEPROM have been corrupted by write errors caused by bad solder connections, the actual chip is undamaged and really does not need to be replaced.
		The trick is that some of the values in the EEPROM are sent to the micro when the set is plugged in, and others when the set is turned on.
		If data is there all the time, the EEPROM is corrupted and the TV will need to go in for service as you will need several signal generators to realign the TV's chassis values and a calibrated cable signal generator to realign the tuner stored values.
	www.repairfaq.org /sam/rcatune.htm (19945 words)

	Electrically Erasable Programmable Read-Only Memory - EEPROM
		Short for Electrically Erasable Programmable Read-Only Memory, EEPROM is a type of PROM that can be erased and reprogrammed using an electrical charge.
		Unlike most memory inside a computer, this type of memory remembers data when the power is turned off.
		EEPROM is often used to store information for the computer's BIOS.
	www.computerhope.com /jargon/e/eeprom.htm (70 words)

	HI-TECH Software Forums: What's wrong with EEprom & 16F628A?
		He is trying to use the new eeprom qualifier (which, by the way, should never be used alongside the old eeprom_read()/eeprom_write() functions or their macro versions) and is expecting values in EEPROM to be valid immediately after assignments to eeprom-qualified variables.
		About EEPROM qualifier, if it do not do the right job for which it was implemented.....
		I've seen problems with PICs in the past (including their EEPROM interfaces) and if I hadn't used my own libraries then I would have spent time looking at the software libraries provided by the tool vendor first, before looking at the silicon as a problem.
	www.htsoft.com /forum/all/showflat.php?Cat=0&Board=pic&Number=20258&Searchpage=1&Main=20206&Words=+waka&topic=&Search=true (513 words)

	EEPROM (Hardware IDs) Search Help (Site not responding. Last check: 2007-10-26)
		Modern, PNP-device modems have Hardware IDs which are stored by the manufacturer within an EEPROM chip in the modem.
		The EEPROM also contains other info which can be used both internal and external to the device.
		This also suggests that all drivers for that modem are capable of working with this EEPROM ID, whether the drivers contain it or not.
	www.modem-help.com /esearchhelp.php (3318 words)

	EEPROM Programmer (Site not responding. Last check: 2007-10-26)
		I designed this EEPROM programmer after I came to the conclusion that I was too broke to buy a real one, and that even if I wasn't too broke, they're a complete rip off.
		Before you get the schematics, please note that they are in the public domain, and are provided without warranty, and I disclaim all responsbility for everything that happens to anything.
		During the write, the only times where the programming program gives up the CPU is when it is waiting for the EEPROM write cycle to complete (minimum of 5ms, but the Linux scheduler has to give something else a minimum 10ms, so we always wait that long).
	www.miranda.org /~jkominek/hardware/eeprom (501 words)

	Interfacing a 24C32 32K Serial EEPROM with a PC Parallel Port
		In reading from the serial EEPROM, the SDA lead is brought high by the PC and the state appearing on the /STROBE lead is read using the inportb instruction.
		Writing data to the EEPROM consists of sending the command byte, followed by the high byte of the address, the low byte of the addresss and finally the data.
		At the conclusion, the EEPROM may take some time to program the data and in function write_random_data, the EEPROM is polled up to ten times for an acknowledgement.
	www.phanderson.com /printer/24c32/24c32.html (1352 words)

	Paul's 8051 Code Library, 93C46 and 93CS46 Serial EEPROM
		There are several types of Serial EEPROMs, but most of them fall into either a 2-wire or 3-wire interface category.
		Atmel has data sheets on-line for most of their EEPROM and microcontroller products.
		These 93C46 Serial EEPROM devices are used in many commercial products where the data contained within the chip, though only 128 bytes, is considered confidential and proprietary.
	www.pjrc.com /tech/8051/serial-eeprom.html (1490 words)

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