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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It datzsheet not necessary to erase memory locations before writing. I 2 C is a trademard of Philips. The two extra pins not required for the 93C46 are manipulated by all the routines. A few sources of further information about Atmel AVR microcontrollers are listed below: Please consult the relevant Atmel datasheet.

93C46 – x8(1k) Serial CMOS EEPROM Technical Data

They have also added example code similar to the code below, as dtaasheet as for I 2 C parts they offer. A simpler approach may be to set the bit addresses of these bits in the.

The menu-driven example code includes a copy of these routines and calls them properly to allow the user to view and edit the values within a 93CS The erase functions provided in the 93C46 are unnecessary for the chips I’ve used, double check your data sheet. The code is basically designed to manipulate a single 93CS46 chip, connected to six of the port pins. F Errata Sheet Rev. Partof the design will decrease in an Atmel part as we do not sacrifice lo gi c to i m pl eme nt th e.

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. In this state, the chip may have better resistance to accidental data loss due to problems on the power supply, noise on signal lines, etc.


Unfortunately, these chips use an 8 bit address field, whereas the 93C46 uses only 6. Flasher with Trailer Control Atmelswitches to frequency doubling, just like the standard flashers e. Atmel Corporation makes dataeheetwarranty which is detailed in Atmel ‘s Terms and Conditions located on the Company’s web site. I might make another version of the code specifically for the plain 93C46, if anyone wants it enough to let me know.

This 3-Wire interface chip actually has 6 wires. The next access should be to this register instead of the memory. In addition, WEN may have to have been called, datasyeet your data sheet or just do it to be on the safe side.

The erase functions are not implemented here. Early versions of this code worked with the 93C56 and 93C57, which have more memory. Usually, the 3-wire devices require an addition wire beyond the 3 for data transfer for each chip to be used. The early versions are long since gone. This code should work “out of the box” with a 93CS46 chip.

93C46 Datasheet pdf – 1K V Microwire Serial EEPROM – Microchip

It can be used without much difficulty with a 93C46, by avoiding calls to the routines that manipulate the extended features of the 93CS The device is manufactured ng Atmel ‘s high density non-volatile memory technology. The dqtasheet that you have frozen the protection register is stored in the non-volatile memory 10 year min retention.

Of course, WEN must still be called before writing. Writing takes a considerable length of time milliseconds.

In addition, a considerable length of time milliseconds is required to perform a write operation. Atmel can also accept a number of other design formats with varying degrees of effort required for each.

It can never be modified again after this operation. See full device support list fortool by a number of major semiconductor manufacturers, including Altera, AMD, AtmelFairchild. This operation must be performed before a write may be issued.


National Semiconductor has lots of data sheets on-line. All protected memory locations will forever be unwritable, but the locations not protected will remain subject to WEN and WDS. There are lots of other distributors too, but Mouser and DigiKey are probably the easiest, since they give out a free catalog What this family code does This code was written to support the 93CS Their datsheet number is As the pressure on engineers to make products smaller has grown, semiconductor manufacturers have introduced several new interfaces, usually aimed at datadheet a product’s size and cost Description The bipolar integrated Atmeltrailer hook are equipped with additional pilot lamps in the dashboard.

MicroChip now has data sheets on-line for most of their products. As data sheets are often updated on a regular basis, it is recommended that you consult the Atmel web site for the latest information.

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

This routine just waits for it to finish before returning Use of this code library to modify the behavior of commercial products, without the expressed written authorization of the manufacturer, is also prohibited.

The routines available for your code are: All memory locations before and including the value in R0 will become write protected.

As mentioned above, four wires are actually required, and the 93CS46 has two additional lines that work together with a special write protection register. Atmel ATA is off i. To reclaim these pins, remove all the instructions that use ” pe ” and ” pre ” symbols.

Both the and ER use the 93C46 serial.

It applies to both the 93C46 and 93CS46 chips. If you do use it, I hope that you’ll give me some feedback.