All Questions
20
questions
0
votes
0
answers
72
views
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 ...
- 13
1
vote
1
answer
505
views
SPI EEPROM refuses to communicate, returns FF or 0 every time
I've been trying to learn SPI, using an EEPROM 25L4005. I've tinkered with it all day, read the datasheet multiple times, but still the output from the EEPROM is FF. The data is sent to the slave ...
- 81
1
vote
1
answer
229
views
EEPROM usage in LAN9500 USB to Ethernet IC
I'm using a Microchip LAN 9500 USB 2.0 to Ethernet IC - Datasheet
However, I don't want to use the EEPROM section, and I don't want the IC to be connected to any EEPROM.
What do I have to do with the ...
user220456
2
votes
2
answers
290
views
How to know if an EEPROM IC can interface via Octospi?
I just learned that Octospi can NOT be configured to be used as a standard SPI device as Octospi was designed to be used to interface with external memory devices.
The thing is, EEPROM ICs don't seem ...
2
votes
1
answer
618
views
Reading EEPROM memory (Winbond W25M02GV) with FT4222H USB bridge
I would like to read an EEPROM Memory (SPI Flash Winbond) using an FTDI USB/SPI bridge (FT4222H).
I developed a c++ application that connects to the FTDI and reads data from the memory(and using the ...
- 21
0
votes
1
answer
687
views
How does a CRC check work between a microcontroller and EEPROM?
I have communication between an EEPROM and a microprocessor over SPI and I want to take care of data integrity.
Could you please confirm my below understanding?
I have a data which I want to write in ...
- 1
1
vote
1
answer
404
views
Interface USB and SPI flash (Boot PC from SPI)
Basically I am looking for a way to boot a PC from SPI flash. I'm talking about average AMD/Intel desktop mainboards. BIOS is already on SPI, but I need a way to also put the kernel and maybe initrd ...
- 19
1
vote
1
answer
309
views
EEPROM returns 0 while trying to read anything
I'm using a CC2652r to try to read and write to an MX25R8035F EEPROM using SPI.
I'm using the build in SPI driver to try and communicate with the EEPROM but while the drivers says it succeeded the ...
- 53
0
votes
0
answers
279
views
Is normal SPI device compatible with SPI I/F?
Audio controller AK5374 that I use requires EEPROM with SPI. However, in the specs it is written, that it communicates with EEPROM via SPI I/F. Will normal EEPROM be compatible with this interface?
- 167
0
votes
1
answer
162
views
EEPROM 25LC1024 issue with PIC32MX OLIMEX board
I am trying to read the status register for the EEPROM following the instructions in this Application Note. I wanted to have the opinion of the community on the signals I am getting. They don't seem ...
1
vote
1
answer
669
views
SPI software select not staying low
...and a few other things. I am working my way through Geoffrey Brown's book Discovering the STM32 Microcontroller and it's largely been smooth so far. I've come across an exercise where the reader ...
- 591
0
votes
2
answers
231
views
SPI timing of 25LC1024
I'm using an EEPROM chip from microchip, it's doc gives the read/write timing as below:
I'm a little confused. From FIGURE 1-2, I think it will read data in at the rising edge of SCK. But from FIGURE ...
- 5,886
0
votes
1
answer
143
views
How to select specific programmer from multiple when using flashrom
I have 4 CH341A programmers connected to my laptop. They are all connected to the same USB hub. Reading the content of a SPI EEPROM works fine.
How do I select the programmer (of these 4) to be used ...
- 35
11
votes
1
answer
6k
views
SPI data storage devices: (micro)SD card, DataFlash, or serial EEPROM?
I am revisiting some of my design habits, and one of them is under serious scrutiny: the go-to SPI-based storage device is (micro)SD cards, for their price-to-capacity ratio and generally higher ...
- 2,873
16
votes
2
answers
35k
views
USB, UART, SPI difference and usage? [closed]
I am trying to enabling an embedded system built around Intel D1000 MCU. I am mainly from a software background and just starting to catch up with some hardware knowledge.
I am trying to build ...
- 1,192