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

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35 views

Testing eMMC host controller on a development board having SD connector

I have xilinx's ZC702 evaluation board. The board has SD connector. I want to test my eMMC host controller. I have found out some SD/eMMC adapter (http://www.kingston.com/en/flash/emmc). This adapter ...
0
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0answers
22 views

STM32 Getting incorrect data from SDRAM through DMA2D

I have an 800x600 pixels RGB565 image stored in the SDRAM of my STM32F7-discovery board starting at memory address 0xC0390000. What I want to do is saving this image to an SD card. The code for this ...
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1answer
34 views

SD Card Reader with LPC43xx

I am trying to implement an sd card reader on lpc43xx devices. For this I can make use of the LPCopen examples that use the ROM based drivers. However for some reason the ROM based driver example ...
-1
votes
1answer
72 views

STM32F7 FATFS and SD card Write problems

I have an STM32F7 discovery board and have an image in the SDRAM which I want to store on the SD card as BMP file. I am using chan's FATFS module with the sddiskio module and the BSP library from ST, ...
0
votes
2answers
120 views

Error initiating microSD card in SPI mode

I am trying to interface a 32 GB microSD card with PIC32MX795F512L using SPI communication. SPI communication is working fine as I have tested it by shorting the Data Input and Output line and ...
0
votes
1answer
100 views

Writing large volume of data to SD card

I'm planning to make a data logger project with 3-axis sensor and SD card. I would like to store 3200 samples per every second on SD card. Currently I could able to store only 630 samples per second. ...
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0answers
3 views

Corrupted files generated by Arduino with SdFat library. How to avoid that? [migrated]

I got: https://www.arduino.cc/en/Main/ArduinoBoardDuemilanove http://wiki.iteadstudio.com/Stackable_SD_Card_shield_V3.0 (set to 5V logic) with this sketch using ...
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1answer
46 views

SD Card Trace Inductance and Capacitance

Most (if not all) SD card datasheets contain the following requirements, which I gather are copied from the standard: 16nH max trace inductance for f < 20 MHz 40pF max line capacitance Two ...
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votes
2answers
50 views

Will cutting only the Power Lines damage the Data Lines or the Device?

A USB 2.0 Cable should have 4 cables. They are the Vcc, Data+, Data- and Ground. Will only disconnecting the Vcc OR Ground Wires damage the Connected Device or the Data Wires? I currently have a USB ...
1
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1answer
72 views

What is the way to detect sd card insertion/removal?

I am interfacing 32GB Micro SD card with PIC32MX795F512L. I am following the examples provided in Lucio de Jasio book. In one of their example, they are using ...
0
votes
1answer
46 views

How to set SD card clock frequency between 100 kHz - 400 kHz

I am interfacing a 32 GB microSD card with PIC32MX795F512L. I am following the examples provided in Lucio de Jasio's book. As the author has described that to set a 250 kHz, they are ...
5
votes
1answer
449 views

What does SWITCH pin do on a microSD connector?

I'm trying to connect a microSD card connector to my project (Molex 502774) and am slightly confused by the extra pins (nails?) provided. One of them is marked DETECT NAIL and the other one is SWITCH ...
0
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2answers
54 views

What extra circuitry is recommended for a plain micro SD card adapter

I intend to use an SD card to record the movement (X,Y,C) of an animal for a research purpose. I am using the Texas Instruments ARM Cortex-M4 TM4C123GH6PM launchpad along with a Sparkfun Micro-SD ...
0
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1answer
111 views

Do SD cards operating at 1.8V save any power compared to 2.7 - 3.6V?

Excuse me if I'm repeating my previous question, but it wasn't getting any answers probably because it was too broad. So, let me narrow the question down to just UHS SD cards that can operate at 1.8V ...
3
votes
1answer
115 views

For variable voltage devices, namely SD cards, how much power do you save by using a lower voltage?

I'm designing a computer vision system and my 3 main components are microcontroller (VDD = [1.8V, 3.6V]) microSD card (4 bit mode, VDD = [2.7V, 3.6V] according to SD 2.0 standard) cheap cell phone ...
2
votes
0answers
60 views

Atmel ARM Boot from MicroSD card

I studying the Atmel's ATSAME70Q19 Datasheet and i'm a little confused about boot operation mode from HSMCI. In Page 892, "38.11 HSMCI Boot Operation Mode" there's a reference which says: In ...
0
votes
0answers
57 views

Reprogramming Zigbee chip (CC2530) packaged in micro SD

I have a medical device transmitting data over Zigbee. I want to receive this signal on a smartphone without any hardware add-ons. I've found a Zigbee chip packaged as a Micro SD card that fits into a ...
0
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2answers
80 views

Noisy Logic Level Converter for SD Card

I have designed a Arduino shield that is designed to be placed in the field and log data from a sensor which it then saves to an SD card. In order to log this data, I must convert 5v SPI to 3v3 of ...
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1answer
57 views

High Speed Data Acquisition with SD Card Write

I am collecting data from several dozen sensors over an 8 MHz SPI bus at 400 Hz. It is critical that the sensors are sampled at this rate with no lost packets. In order to do this, I have a timer ...
2
votes
2answers
83 views

NO CD pin in SD card module by LC Studio?

I have a SD card module by LC Studio. I am interfacing it with PIC32. This module consist of 6 pins: CS MOSI MISO CLK 3v3 GND ...
0
votes
0answers
56 views

Prevent micro-SD card from being removed from the reader slot

I need to prevent a micro-SD card from being removed from the reader slot on a Raspberry Pi 2 board. The reason for doing that is I want to protect my software at least a bit so that in case someone ...
1
vote
1answer
179 views

Card Detect Pin of SDHC Interface

I am working on a design with a processor which has I2C SCL line & SDHC_CD(Card Detect) pins multiplexed. I need to use I2C line. I am giving SD Card for boot code of processor. I have below ...
6
votes
10answers
3k views

How to make 1 bit permanent memory circuit?

I would like to make a simple circuit to store or save 1 bit of data. The circuit should be able to remember the state of an LED ( on or off ) even if the supply is disconnected from the circuit. I ...
0
votes
2answers
184 views

Use SDIO pheripheral for quad SPI flash memory

I am currently doing a project using the STM32F103 micro-controller. The project requires external flash memory to store images and data for later showing on LCD. The problem I have is that I want ...
3
votes
4answers
422 views

Operating an SD card module with only two pins

My standard SD card module uses four pins: SDCS, MOSI, SCK, and MISO. However, I can only dedicate two pins of my ATtiny85 to operate it. Is there a way I can do this without using more ICs, such as ...
1
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0answers
80 views

Command Response SD Card Timing in SD Mode

I'm making a SD card stack and I'm currently starting to implement the SD mode. In SPI mode a card is able to receive the command, put the DO/MISO line in '1' while is taking care of the response and ...
0
votes
2answers
101 views

Printing SD Card File contents on LCD

This is a part of my program which reads data from SD card File and Display that on LCD screen. ...
0
votes
1answer
175 views

Replacing SD card reader on a Raspberry Pi B+

I recently purchased a Raspberry Pi B+. However, the micro SD Card reader had a defective spring loading mechanism, so the card would not lock in place (a new Pi is now on the way!) However, I would ...
1
vote
2answers
100 views

How to correctly connect a MicroSD card to an FPGA device

I want to ask how to correctly connect a MicroSD card to an FPGA device(not spi version), consider all FPGA pins will be floating for an amount of time before FPGA is configured. I've found a lot of ...
3
votes
0answers
92 views

FSInit() - “CE_BAD_PARTITION”

I am using a PIC18F26K80 and an XC8 compiler. I am trying to initialise an SD card and create a file. I have simply formatted the SD card on Windows to have a "FAT32" file system and an "Allocation ...
1
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0answers
137 views

Send a file to an SD card over SPI

I am using a PIC18F4620 and an XC8 compiler. I am trying to create a file and send it to the SD card. I am using the MDD library from the MLA Legacy. My main is: ...
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2answers
294 views

SD card SPI interface for PIC18F25k80

I am using a PIC18f25k80 microprocessor and I want to transfer data on an SD card over SPI. The compiler I am using is MPLAB X XC8. Could you please provide an example of how I can initialise the SD ...
0
votes
1answer
298 views

I2C-to-SPI bridge and SD card

I am using a PIC18F25k80 microprocessor, which is communicating by using I2C protocol with peripheral ICs. After collecting the data from the ICs I want to store them in an SD card. However for the SD ...
1
vote
0answers
180 views

FatFs issue with f_write and f_sync

I'm trying to set up a PIC18F67K22 to log data to an SD card, but I am having some trouble getting FatFs working properly. I implemented some low level code following the diskio.c API that is ...
2
votes
0answers
160 views

SPI / SD Card communication issues

I am working with a PIC18F67K22 and am seeing some bizarre things in the SPI data stream. I am trying to interact with a FAT32 partition using FatFs and a custom built diskio.c file. I am able to ...
0
votes
2answers
198 views

Why SD card is less durable than internal storage in smart phones? [closed]

For instance, Raspberry PI managed to destroy SD card in few weeks. (It seems to be a common problem.) However, internal storage in a smartphone works well for several years (5-years-old Nexus One is ...
0
votes
1answer
92 views

Is it possible to check max storage address of a SD card via a command?

How much memory can an SD card hold? I am not going to use a data format. I want to use it as an upgradeable internal storage. So I want to know in which range of addresses I can work. Maybe there is ...
2
votes
2answers
158 views

Read SD card without a file system [closed]

I design a DAQ to collect data from different sensors. The data are written on an SD card by a microcontroller, dsPIC33FJ256GP710A. The data are stored without a file system for speed reasons. Now I ...
2
votes
0answers
86 views

SD Card Buffer in FreeRTOS

One of my tasks in project is resposible for gathering information about values measured from sensors and write information in .txt file on SD Card. I've got question, how would be the most correct ...
2
votes
1answer
143 views

My For loop isn't exiting and I don't know why

I'm programming an ATMEGA328p on a breadboard and using an arduino board to do the USB to Serial conversion. Part of some code I'm writing involves a for loop that is being used to take the 8 bit ...
1
vote
1answer
126 views

Problems initializing SD card with MSP430

I've been working on some code to talk to an SD card with the MSP430. I can't get the card to enter into idle mode, and I'm actually pretty stumped as to why. I've looked at the microcontroller output ...
0
votes
2answers
154 views

SDXC Card Reader with LPC1822

in my application I have an SD Card reader using the NXP LPC1822 microcontroller. It works very good with all SD- and SDHC-Cards I've tested so far. Only thing that does not work is SDXC. I already ...
-1
votes
2answers
277 views

Most carefull way to concatenate strings in C

My firmware in one cycle per 10 second is moving string to the output (csv file on SD card). The problem is that string sometimes in non-deterministic way is changing adding values that shouldn't be ...
1
vote
1answer
399 views

A USB SD card reader on your own PCB

I'm actively looking for a solution about this since nearly 2 months: I need to build a USB SD card reader slot for my project www.samplerbox.org. I tried various solutions: buy some cheap USB SD ...
0
votes
1answer
337 views

File transfer between two gsm modem

I'm wanting to build a system that will store value on a SD card to form .CSV file , that this is not a problem. There will be about 1000 value recorded daily.I'm wanting to send this values to a pc ...
6
votes
2answers
556 views

What does it mean when components in schematics do not connect?

I'm fairly new to the whole Arduino world, and I'm just really curious about this schematic that I came across... I can read the basics of a schematic, but this one has me puzzled. What are the ...
0
votes
1answer
161 views

Arduino to read file data from SD storage board, and PC user to update same file via usb cable as needed

I have a project where in the finished product (sketch loaded to Arduino and it's running on its own), Arduino needs to regularly read data from a text file stored on a SPI Micro SD storage board (the ...
1
vote
1answer
126 views

microSDXC Card not responding to SD Interface commands in 3.3V mode

I want to interface a 64GB microSDXC Card via 50MHz SD Bus mode (not UHS, 400kHz during initialization). My initialization sequence works fine with the regular 2 GB SD card from my phone up to ACMD41, ...
0
votes
1answer
172 views

STM32 and SDCard: space management

My task is to gather measurement from peripheries of STM32F4 on SDCard and I started reading about this. Could you double check if I'm correct: Single block memory on my SDCard is 512 bytes, so ...
0
votes
2answers
580 views

SPI Troubleshooting, Teensy, Arduino, and tri-state

I'm trying to get my SPI bus devices up and running on a custom circuit board that I've soldered together. Unfortunately, I neglected to add probe testing spots on this particular circuit board, and ...