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SUMMARY DESCRIPTION. These electrically erasable programmable memo- ry (EEPROM) devices are accessed through a Se- rial Data. 93C46 are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 93C 93C46 datasheet, 93C46 pdf, 93C46 data sheet, datasheet, data sheet, pdf, Microchip, 1K V Microwire Serial EEPROM.

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PREN should only enable use of the protection register for the next access, so it should be called before every protection register access.

【93L46SN/93C46】Electronic Components In Stock Suppliers in 2018【Price】【Datasheet PDF】USA

Please consult the relevant Atmel datasheet. I used their 93CS46 data sheet to write the code. These devices are usually used to store user configurable parameters and device serial numbers. Valid address range for R0 is 0 to As the pressure on engineers to make products smaller has grown, semiconductor manufacturers have introduced several new interfaces, usually aimed at lower a product’s size and cost Atmel Corporation makes nowarranty which is detailed in Atmel ‘s Terms and Conditions located on the Company’s web site.

Pin Configuration Figure If you do use it, I hope that you’ll give me some feedback. Writing takes a considerable length of time milliseconds. This code should work “out of the box” with a 93CS46 chip. Disclaimer These 93C46 Serial EEPROM devices are used in many commercial products where the data contained within the chip, though only bytes, is considered confidential and proprietary.

This disables write operations.

The device is manufactured ng Atmel ‘s high density non-volatile memory technology. F Errata Sheet Rev. Outputslbit12 0.


Details of each macro can be found on the Atmel web site, at http: It’s up to you. As mentioned above, four wires are actually required, and the 93CS46 has two additional lines that work together with a special write protection register.

(PDF) 93C46 Datasheet download

Unfortunately, these chips use an 8 bit address field, whereas the 93C46 uses only 6. MicroChip now has data sheets on-line for most of their products.

The fact that you have frozen the protection register is stored in the non-volatile memory 10 year min retention. National Semiconductor has lots of data sheets on-line. I 2 C is a trademard of Philips. There are lots of other distributors too, but Mouser and DigiKey are daasheet the easiest, since they give out a free catalog What this family code does This code was written to support the 93CS It is not necessary to erase memory locations before writing.

This operation must be performed before a write datashest be issued. There is no way to undo this operation They use a serial bus interface, which allows them to be packaged in inexpensive 8 pin packages. The two extra pins not required for the 93C46 are manipulated by all the routines.

Usually, the 3-wire devices require an addition wire beyond the 3 for data transfer for each chip to be used. A few sources of further information about Atmel AVR microcontrollers are listed below: The menu-driven example code includes a copy of these routines and calls them properly to allow the user to view and dafasheet the values within a 93CS The next access should be to this register instead of the memory.


Atmel can also accept a number of other design datashewt with varying degrees of effort required for each. In addition, WEN may have to have been called, check your data sheet or just do it to be on the safe side. The erase functions provided in the 93C46 are unnecessary for the chips I’ve used, double check your data sheet. Please explain the difficulty you have using the code with a 93C46 or the trouble you think you may have.

Two versions of the code are available, one with a little menu driven user interface via a terminal connected to the UART and the other with only the routines to include in your existing program. This code library is in the public domain. Their literature number is Coliseum Business Centre Riverside Way.

93C46 Datasheet catalog page 8

The user interface is simple and shouldn’t need documentation. All protected memory locations will forever be unwritable, but the locations not protected will remain subject to WEN and WDS.

They are usually specified to retain the data for 10 years and to endurewrite operations before failure.

Because these chips use a serial interface, they can not be read quickly enough to serve as conventional memory. This 3-Wire interface chip actually has 6 wires. It applies to both the 93C46 and 93CS46 chips.