Questions tagged [eeprom]
Acronym: Electrically Erasable, Programmable Read-Only Memory. Sometimes used with Flash parts that are similar to old EEPROM parts.
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Is this EEPROM write procedure on STC microcontrollers correct? Any alternative?
I'm working on a STC15W204S microcontroller, a small, cheap and capable 8051 microcontroller. So far, with the flexibility of SDCC, using the provided STCAI-ISP software and the datasheet (which is ...
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EEPROM M93C66 SPI Based
The M93C66 EEPROM have a 16 bit organization. Does this mean we have to send the instructions 16 bit format or 8 bit format?
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What is the memory address for 24AA16 EEPROM IC?
I am using 24AA16 EEPROM IC to read and write. But i don't know exactly the memory adddress to write something in this IC and also read from that. This is the datasheet for this IC,
https://ww1....
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EEPROM READ/WRITE Issue with STM32?
I am using 24AA16 EEPROM to store my data. I have write the code for read and write using STM32Cube IDE. I am using Nucleo-F410RB Dev board. Below code is for write,
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RTL2832U EEPROM FW, Unknown USB Device (Device Descriptor Request Failed)
How to flash config into just produced SDR based on the RTL2832U?
And what exactly to flash?
With empty flash - windows gave an error Unknown USB Device (Device Descriptor Request Failed)
The ...
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Extending EEPROM I2C addressing
So I have a interesting problem that someone could give their input.
I'm working on a project where I have 100 "devices" each with its own EEPROM. The "devices" can be connected ...
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How to write 16 bit hex codes into 93C46 EEPROM with Arduino
I am trying to write data to an EEPROM with some success but not quite. The chip is a 93C46 128 words at 8 bit or 64 words at 16 bit. The data to go in is in 64 word (16 bit) format as follows:
When ...
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Writing EEPROM on PIC18F27Q83
I'm trying to write the EEPROM (DFM) on a PIC18F27Q83. I copied the sequence from the datasheet exactly and it still fails. The device id is 0x9909 and revision id is 0xA45.
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What is the reasoning behind parallel memory pinouts?
Many of the parallel memory chips I’ve come across have counterintuitive address line pinouts. Take the AT28C256 32KB EEPROM, for example:
The data pins are in near-ascending order (only interrupted ...
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Turn TTL high output signal into ground pulse for EEPROM write
I have a TTL-high output signal which I wish to use to send a negative pulse to a 28c256 EEPROM WE pin to write to it, but the high line may remain high until the next clock signal/output change etc.
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What IC is ATMLH714?
I am diagnosing a PCB that has an 8 pin IC with marking: ATMLH714. I couldn't find any datasheet for the component online. However, I suspect it is an EEPROM possibly by Atmel.
Would anyone have any ...
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Losing external EEPROM data after power Cycles on ESP32
Sending "1" starts the write operation into the eeprom every 1 second to the next available address, and sending "2" starts reading the written values into the eeprom. When there's ...
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Words on 7-Segment Displays [closed]
I'm working on a project that uses three 7-segment displays. My aim is to show the words 'CAT', 'DOG', and 'FOX' using the 3 displays, one word at at time with a 1 second delay in between.
To achieve ...
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External NOR Flash malfunctioning
External NOR Flash malfunctioning
Part used: ZD25WQ16CTIGT Zetta NOR Flash
We are using Zetta family 16MBit NOR Flash in a partitioned format. One partition is used as an emulated EEPROM, and another ...
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How to write a lookup-table into an 28C64 parallel EEPROM?
Based on the program from this post 28C64 EEPROM Programming Using Arduino, I would like to write, using Arduino Mega, a lookup-table that contains one sinewave cycle, created in Excel. I would like ...
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What is needed for a 512Kb HDMI EDID EEPROM? (re: 512KB IC2 EEPROM) [closed]
I'm trying to build an HDMI "dummy" plug that simulates a plugged-in monitor (to trick GPUs into thinking a monitor is plugged in).
Many of these "dummy" adapters exist and are ...
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Problem in code while interfacing PIC24 with 25AA256 EEPROM
I have been trying to interface a PIC24FJ128GA010 with a 25AA256 EEPROM using Proteus and Serial Peripheral Interface (SPI).
I wrote a C code and configured everything and all pins but since I self ...
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What is 0-255 in EEPROM in Arduino?
I am trying to use the EEPROM in Arduino but somehow getting the wrong number. Can anyone explain to me what does that parameter 'value' of 0 to 255(byte) actually mean does it mean it can only hold a ...
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What is a color bars vector diagram?
I'm reading the datasheet of the "AT7456E". This component is an OSD (so-called "on screen display") used on the flight controller of my drone project.
In the datasheet there was ...
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Non-standard bitrate for I2C EEPROM
I have an I2C bus containing only 2 devices: a microcontroller and a Microchip 24LCXXX EEPROM.
In the datasheet of the EEPROM only maximum speed is specified (which is 100 kHz @VDD<2.5 V and 400 ...
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Can I write and read a parallel EEPROM content with Analog Discovery 2?
I am wondering if I can read or write the contents of a parallel EEPROM (e.g., 28C64) using Analog Discovery 2. Is C/C++ necessary for this purpose, or is Java sufficient (since AD2 allows scripting ...
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How can I dynamically preload the EEPROM on a PIC microcontroller
I'm trying to set up code to preload the EEPROM of a PIC16F628A with the necessary data depending on the value of one #define, so the uC is ready to be popped into ...
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Is it safe to replace a 120ns Flash memory with a 90ns part?
Here is an old PLC board with a pair of AM29F200AB-120SI SOP-44 256kB 5V flash chips. One is unable to retain data, after nearly three decades in service.
These are very challenging to find today, ...
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Does "field electron emission" used in EEPROM work better than "hot-carrier injection" in NOR Flash?
After deeping research based on my another question, I continued comparing Flash and EEPROM based on wikipedia comparison table.
From wikipedia about the Flash memory:
Programming
the source-drain ...
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Differences between EPROM and EEPROM
I found one valuable Utmel blog which explains the three things:
The internal chip can be erased by irradiating ultraviolet rays through the hole. The EPROM eraser is needed to complete the chip ...
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Internal EEPROM on PIC16F628A
I'm currently writing code for an alarm system, and I'm having some issues with the EEPROM at the moment of writing/reading (with MPLAB) its contents. I'm not trying to write any variables or ...
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Does ESP32 Wroom-32 have internal EEPROM?
I'm working with ESP32 Wroom-32 and AHT25 temperature and humidity sensors. I need to store the temperature and humidity data using EEPROM.
I don't think ESP32 has internal EEPROM. If not means how ...
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Is it possible to simulate an EEPROM with the STM32 F446RE chip?
I looked through the STM32 F446RE datasheet and was unable to find a way for the chip to keep persistent data values for when it is turned on and off, or when reset.
The only alternative I can think ...
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Converting an application from ESP32 board to STM32 board
I wrote an app for my ESP32 but then I learned that ESP32 doesn't work well on batteries, since they got drained pretty quickly.
So I bought a STM-32 board (NUCLEO-32, STM32L432KC MCU): https://www....
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Issues reading data back from 24LC512 EEPROM via interrupt on MSP430F47187
I have interfaced MSP430F47187 with 24LC512 EEPROM. I am able to write to the EEPROM without any issue but reading the data from the EEPROM is problematic as the reading stops after a while.
I have ...
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