Questions tagged [sd]

Secure Digital (SD), a memory card standard. Has multiple form factors (Standard, MiniSD and microSD/TransFlash) and multiple capacity ratings (SDSC, SDHC, and SDXC). Also extends to SDIO, which allows peripherals in an SD form factor to attach to a host, similar to USB.

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MicroSD to USB adapter

My goal is to make a MicroSD to USB adapter myself. With this question, I saw that I can use a USB2240 controller chip to connect my µSD card to my computer. In ...
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microSD card voltage level- reverse engineering design

Goal: Adding (back) a microSD socket to a camera that does not have one. The microSD pads are laid out and appear to be fully connected. Ground is to the ground plane, the data lines are with ...
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flash SPI memory vs USB SD card

i need to be able to update this memory storage device 1000 times per second via MCU in small 8 byte of data chunks trasnfers, and then read back the data into the PC. Should I go for the USB SD card ...
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Use MicroSD to SD adapter for read Memory Stick Micro M2

While searching in my personal affairs I found a Memory Stick Micro M2 (Sony) which I believe I was using in a phone. Unfortunately I no longer have the adapter ...
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31 views

STM32WB - sensor data sent via BLE and saved on SD card (SPI)

I have an STM32WB and I am trying to get the data from some pressure, temperature and humidity sensors through DMA and send them to my Android via BT, while at the same time saving it as well on a SD ...
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37 views

Open multiple files on SD Card using FatFs

The code is to log data in multiple files on SD card. The problem is that the SD card only opens and saves 1 file. When the if condition occurs in the 2nd time, the old file is deleted and the SD card ...
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1answer
45 views

Switch power on/off when SD card is inserted/removed in slot

I have ESP32 and I'm using it to read/write data from an SD card that is directly connected over SPI. This works fine. Now I want to switch on the ESP32 automatically by switching on the 3.3v power ...
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14 views

Part number / manufacturer of microSD connector of Raspberry PI zero

Do somebody know what is the part number / manufacturer of microSD card of Raspberry PI zero? I would like to include it on my Digikey cart if possible. Schematics does not show the part number... ...
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USB2244 enumeration failure

I have a PCB with a USB2244 USB to SDIO bridge IC connected to a Raspberry Pi Compute Module 3+. I (think I) designed based on the schematic circuit for the USB224x evaluation kit EVB-USB2240-IND. ...
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47 views

STM32WB55 connection to SD card with SPI FR_NOT_READY

I am very new at this and I don't understand a lot, so please be patient. I have an STM32WB55 to which I need to connect an SD module to store data from some sensors in SPI mode. I basically followed ...
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STM32 Nucleo board, SD card displaying symbols instead of numbers

Devices: STM32F4 The SD is working and the data is saving on the SD, but the problem is that the integers are displayed as symbols in this SD. So I think that the problem is that the function I used ...
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SD Card detect switch circuit diagram

I need to work on a design for an SD card connector. I'm having some trouble understanding the 'SD card detect' Switch and 'Write Protect' switch operation. Unfortunately, I don't have a physical ...
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SD card via SPI: pull-up resistors or dedicated IC?

It's common to find SD card connected to MCU via pull-up resistors, like in the schematics above: Recently I have read that newer SD card to achieve high write/read speeds needs to have sharps edges ...
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Boost converter for powering SD card

I want to use a switching boost converter that has 3.3V output in order to power an SD card. Also, the input voltage is a CR2477 battery, with voltage ranging from 2 to 3 volts. I have seen that an SD ...
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1answer
36 views

Do “standing”/90° MicroSD card slots exist?

For a rather cramped design, I need a way to hold a MicroSD card in a "standing"/"upright" position (90° to the PCB, rather than "flat"/"parallel" like most sockets). The card will be plugged and ...
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SD card SPI initialization Check Pattern Fail

I'm trying to interface a Swissbit 512MB (S-450u Series) SD card (datasheet here) with an ARM microcontroller through the card's SPI interface. The datasheet for this card says it's fully compliant ...
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SD card reader, had to add 1k resistor to make it work, why?

I was having a problem making my sd card reader work with Arduino Mega, I tried a lot of things to no avail until I read somewhere that I should try putting a 10k or 1k resistor in series with the ...
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1answer
52 views

Where is load-leveling data stored on a MicroSD card?

Reading this question on load-leveling of writes on a MicroSD card, Is it true that a SD/MMC Card does wear levelling with its own controller?, it prompted me to wonder where on the MicroSD card is ...
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Can I use the 1.8 inch TFT LCD SD slot for other purposes other than displaying images on the display?

Can I use the 1.8 inch TFT LCD SD slot for other purposes other than displaying images on the display? For example, storing text files on that SD card (that's on the display's SD slot)? Can I use that ...
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1answer
42 views

Can unwritten (but presumably otherwise usable/functional) blocks on an SD ever fail to be readable?

Does an SD come from "the factory" with all of its ECC (or spare area) set correctly? Sometimes when I blindly dd (copy) an entire SD card (that is only partially ...
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52 views

Errors in SPI communication with SD card due to heat

Given is a PCB with a STM32L432KCU6 and a microSD card connected to it via SPI at 40 MHz in SPI Mode 0. The communication is protected by CRC which is calculated by the microSD card on the fly. When ...
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1answer
55 views

Wear leveling and supply of voltage

Does anyone know if a NAND flash device (e.g. microSD) has to be continuously supplied with energy for its wear leveling algorithms work as designed? Or, if it doesn't matter if the device is (safely) ...
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SD card sharing between atmega2560 and sim800

I am designing a data logging system that uploads its data via 2G, and downloads new firmware from a server to the SD card, which the mcu boots from. So far, I have achieved Over The air update by ...
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1answer
93 views

Write endurance: Is there a difference between eMMC and Micro SD Card?

I have seen several forum posts (link 1, link 2) debating whether eMMC offers an endurance advantage over SD cards for embedded applications. My understanding was that the write endurance problem is ...
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Monitoring SD/TF Card status while interfacing with separate host

I'm working on project that requires taking several terabytes worth of RAW photos on DSLR controlled by a microcontroller. Initially the plan was to use a small Linux SBC running some kind of control ...
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1answer
127 views

PCB sound memory for toys [closed]

I want to build a toy. The initial build will be a prototype but if the idea 'sells,' I want to build en-masse. For the prototype, as I do not have (beyond what I learnt at Uni) industry experience, ...
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78 views

How to modify an SD card so it will be read only?

I checked SD card pins and their descriptions and saw that there is a "data input" and a "data out". If I covered, removed the data in pin, would it block all the writing requests to the card?
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Sandisk micro sd card not detected. How to diagnose the problem without knowledge about the sd card protocol? [closed]

Seems to be a common problem with Sandisk micro sd cards. Just a little before or after the warrenty period, the micro sd card suddently stop to be recognized. I mean phones and external card reader ...
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1answer
150 views

Initializing to MicroSD Card with Arduino produces error code 0x43, 0xff

I am trying to interface with a 32GB MicroSD card with an Arduino Uno, but the code consistently fails at the initialization stage. Below is my schematic (sorry for the horrendous schematic, I'm not ...
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Mounting Problems SD Card and STM32F7 Discovery

I've got some problems with the FATFs library and the STM32F7 Series. I want to connect a SD-Card (32GB, SanDisk, FAT32) with the F746G-Discovery-Board to save some data on it. (at first .txt-Files, ...
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CMOS Flash vs SD: Can I put a Gamecube Memory Card in an SD reader?

Backstory I've decided to run "Homebrew" on my Gamecube (and writing Homebrew for n00bs to document the process). Unfortunately, it seems that there's no way to do this without buying special ...
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1answer
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Download a file from web browser to Micro SD card [closed]

I am trying to do a web server to store a file (mostly MP3) on a Micro SD card. I have stm32f407-discovery and w5500 and a Micro SD card reader (unbranded manual pcb drawed). How can I open a web ...
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MicroSD connection

I'm trying to use a different MicroSD for this design, I want to use the DM3AT-SF-PEJM5 instead of the MicroSD-104031-001. I'm not sure about the card detection pins connection, is it correct what I'm ...
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90 views

STM32 SD Card SPI no response

I am using an STM32F0 to communicate with an SD card over SPI. However, when I send CMD0 after performing the required initialization, the SD card does not respond with anything on MISO. What's ...
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1answer
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Why CMD17 cannot return 0xFE?

I have a problem with CMD17 when I send this command and wait response I always get first response 0x00 but when I am waiting at 0xFE it cannot get it. In debug mode I get 0xFE. This my code for ...
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SPI SDHC card will not come ready, Regular (older) SD card works fine

I am trying to make an SPI interface on a 186 Microprocessor using bit banging and a GPIO to control the CS, SCLK, MOSI and reading in the MISO lines. Mode 0. I cannot get SDHC (version2) cards to ...
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1answer
141 views

ADC distortion when writing to microSD

I am doing my own project making a basic audio recording device using microcontroller's ADC to get the audio signal from electret microphone and saving data to microSD card. I'm using STM32L476RG ...
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3answers
243 views

Make an SD card installed on PCB readable through USB

I work on a circuit that logs data onto an SD card. I want to know how I can read the SD card data directly from my PC using USB. I am thinking of using a type of SPI to USB converter because there ...
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1answer
111 views

Will using a microSD card reader with STM32 produce logical errors? [closed]

I have a microSD card reader which needs \$5\,\mathrm{V}\$ to operate. I am interfacing it with STM32 MCU operating at \$3.3\,\mathrm{V}\$. Will it operate normally when I provide only \$3.3\,\mathrm{...
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42 views

CRC error from CMD8 during intialization process?

I am trying to initialize SD card for a project I managed to get reply for CMD0 with 0x01 but when i send CMD8 I get response of 0x09 which means CRC error however I am sending the correct value for ...
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175 views

Can I connect two MCUs directly to one micro SD card without additional components?

I am new to this community so I am sorry if I'm asking in a wrong place or something out of topic. I think I have considered everything. :) So, now the basic info: I am working on a project which ...
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1answer
114 views

Arduino nano + microSD module + ethernet module does not assign IP address

I would like to create a small web server to enable or disable devices via ethernet connection, except that the network module and the SD reader did not seem to work if connected simultaneously. That ...
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1answer
70 views

Level shifting between SD Card and Lipo-powered microcontroller

I have an ATtiny861 microcontroller powered directly from a Lipo battery. My circuit is designed to operate on supply voltages from 3V - 4.2V (bonus if it tolerates up to 4.6V). I need to interface ...
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1answer
71 views

Interfacing SD card with STM32F44

I'm using STM32F44VET6 controller(using cubemx code configurator), I need to interface a 64GB SD card,and this controller has SDIO pheripheral also But I'm confused how to choose interface type SPI ...
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481 views

STM32 SDIO FATFS

I'm using SDIO (1-bit mode) with an STM32F429 Discovery board to read from and write to an SD card. The code below works, I've seen that it does, the problem is it seems to randomly choose when to ...
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Pin confirmation on pic for sd card connector?

I've had a first version of a connection to a sd card connector (DM3CS-SF) for my PIC32MX470F512L that did the following connections: After trying to run an harmony example, using this config, the sd ...
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How much current does a DM3 connector require? [closed]

I'm trying to have my PIC32MX470F512L communicate with the sd card for some time now without success (using harmony sd card example) I checked that the pins CMD,CLK,DAT0,DAT3 are receiving a signal. ...
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132 views

SD Card formatting in FAT 32 file system

I am using NXP Micro for interfacing microSD card with FAT32 file system. for implementation I am using drivers located at below link. https://embedded-code.com/source-code/memory/secure-digital-mmc-...
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Issue with SD Card Initialization via SPI: No CMD0 Response

I am working on a project to read files off of SD cards with an xmega128a4u via SPI. I noticed that some cards initialize without an issue. However, I have two cards that just wont. As far as I can ...
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129 views

CLK signal on DAT0 line on SD protocol?

I'm facing some problems in the initialization stage of the SD protocol on a custom board, specifically when sending the ACMD51 command and reading the Status Card ...

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