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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See full device support list fortool by a number of major semiconductor manufacturers, including Altera, AMD, AtmelFairchild. Use of this code library to modify the behavior of commercial products, without the expressed written authorization of the manufacturer, is also prohibited.
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In addition, a considerable length of time milliseconds is required to perform a write operation. It is not necessary to erase memory locations before writing.
In addition, WEN may have to have been called, check your data sheet or just do it to be on the safe side. PREN should only enable use of the protection register for the next access, so it should be called before every protection register access.
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The next access should be to this register instead of the memory. Atmel ATA is off i. The device is manufactured ng 93cc46 ‘s high density non-volatile memory technology.
Serial EEPROM (93C46 / 93CS46) Routines
Valid address range for R0 is 0 to It is advisable to disable writing if no additional write operations are expected soon. They use a serial bus interface, which allows them to be packaged in inexpensive 8 pin packages.
A few sources of further information about Atmel AVR microcontrollers are listed below: Because these chips use a serial interface, they can not be read quickly enough to serve as conventional memory. It applies to both the 93C46 and 93CS46 chips. Unfortunately, these chips use an 8 bit address field, whereas the 93C46 uses only 6. All protected memory locations will forever be unwritable, but the locations not protected will remain subject to WEN and WDS.
The code is basically designed to manipulate a single 93CS46 chip, connected to six of the port pins. The user interface 93×46 simple and shouldn’t need documentation.
The erase functions provided in the 93C46 are unnecessary for the chips I’ve used, double check your data sheet. A simpler approach may be to set the bit addresses of vatasheet bits in the. Their literature number is They have also added example code similar to the code below, as well as for I 2 C parts they offer. This applies to both the 93C46 and 93CS Description The bipolar integrated Atmeltrailer hook are equipped with additional pilot lamps in the dashboard.
These devices are usually used to store user configurable parameters and device serial numbers. As mentioned above, four wires are actually required, and the 93CS46 has two additional lines that work together with a special write protection register.
93C46 Datasheet catalog page 8
F Errata Sheet Rev. You may use it within commercial for-profit products, without concern of licensing restrictions, copyright, royalties, etc.
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. Details of each macro can be found on the Atmel web site, at http: A zero byte payload will return the current status. They are usually specified to retain the data for 10 years and to endurewrite operations before failure. This disables write operations. Writing must have been enabled using WEN. Usually, the 3-wire devices require an addition wire beyond the 3 for data transfer for each chip to be used.
The fact that you have frozen the protection register is stored in the non-volatile memory 10 year eatasheet retention. Outputslbit12 0. MicroChip now has data sheets on-line for most of their products.
The menu-driven example code includes a copy of these datashet and calls them properly to allow the user to view and edit the values within a 93CS If you do use it, I hope that you’ll give me some feedback. 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.
Pin Configuration Figure