Compact MiniCard Adapter for SD Card Easy to and Mini PCI-e to SD card conversion Install.

About Description:

Introduction:

The MiniCard adapter for SD card is very low-cost SSD and Ready-boost solution for laptop computers.

Your SD card can easily into the MiniCard slot of newer laptops or embedded with mini-card adapter.

The adapter was the best of the external drives. Solid State Drive (SSD) that delivers extra memory and reliably backs up your important data without cables and the protrusion of other, more awkward external storage devices.

The adapter is a USB 2.0 SD/MMC Flash Card Reader single slot. It supports USB 2.0 high-speed transmissionto Secure DigitalTM(SD), SDHC,

SDXC, miniSD, microSD (T-Flash), MultiMediaCardTM(MMC), RS-MMC,MMCmicro, MMCmobile on one chip. As a single chip solution for USB 2.0 flash card reader.

Speed Class notation (for new versions of SD cards and SDHC cards):

The speed classification method for SD cards in the SD2.0 specification is defined as four levels: Class2, Class4, Class6, and Class 10 for regular and high-speed cards, and currently only UHS Class1 for ultra high speed cards. The speed level symbols on the card are shown in the following figure. The reading speed and application requirements that can be met for different levels are shown in the following table.

Product specifications:

1.Designed for use with laptop or embedded computer.

2.Super low power consumption and light weight, comparing to traditional HDDs speed and computer configuration.

3.Compatible with Windows and Linux.

4.SD card Capacity: up to 32GB.

5.Compatible with SDXC card; up to 2TB.

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Product Function Introduction:

This SD card slot to MINI PCI-E product mainly implements the function of converting interface types. It can convert the SD card interface to MINI PCI-E interface, making it convenient for users to use SD cards on devices that only have MINI PCI-E interface. For example, in some industrial control computers or embedded devices, these devices may not have an SD card slot but have MINI PCI-E interfaces. Through this converter, SD cards can be connected to these devices to achieve data storage and reading.

Application scenarios:

For some small servers or storage devices, when the internal storage capacity is insufficient, SD cards can be used to expand storage through this converter. For example, in some Network Attached Storage (NAS) devices, the MINI PCI-E interface may be used to connect other functional modules such as Wi Fi modules, but by connecting an SD card through this converter, additional data storage space can be added to the device.

Equipment upgrade and renovation: This converter can play a significant role in the upgrade process of old electronic devices. If an old device.

only has a MINI PCI-E interface but requires an SD card to update software or transfer data, this converter can be used to achieve compatibility. Taking old-fashioned industrial automation control equipment as an example, SD cards can be easily used to update the control program of the equipment through this method.

Performance characteristics:

Transmission speed: Its transmission speed largely depends on the speed level of the SD card and the bandwidth of the MINI PCI-E interface. Generally speaking, if a high-speed SD card (such as UHS-II or UHS-III grade SD card) is used and the device's MINI PCI-E interface can support high bandwidth, the data transfer speed can reach a relatively ideal state. For example, the theoretical maximum transfer speed of UHS-II SD card can reach 312MB/s, and in a suitable MINI PCI-E interface environment, data transfer close to this speed can be achieved.

Stability: The converter should be designed with signal integrity and electrical compatibility in mind. By using high-quality circuit boards and signal conversion chips, it is possible to ensure stable and reliable communication between SD cards and MINI PCI-E interfaces during long-term use. For example, the converter may adopt a multi-layer circuit board design internally to reduce signal interference, and use conversion chips with good anti-interference ability to ensure that frequent data loss or errors do not occur during data transmission.

Installation and usage method:

Physical installation: Insert the SD card slot to MINI PCI-E converter into the device's MINI PCI-E interface, ensuring that the insertion is secure and the interface matches perfectly. During the insertion process, attention should be paid to the direction of the interface to avoid damaging the interface or converter due to insertion.

System configuration (if necessary): On some devices, system configuration may be required after inserting the converter. For example, in computer systems, it may be necessary to install corresponding drivers to recognize SD cards accessed through converters. The installation process of the driver program is usually relatively simple, and it can generally be installed by downloading the latest version of the driver program from the CD that comes with the converter or from the manufacturer's official website. After installation, the system can recognize the SD card normally and perform data read and write operations.

For compatibility :

SD card compatibility: Supports multiple SD cards with different capacities and speed levels, including regular SD cards, SDHC cards, and SDMC cards. Whether it is a low-speed traditional SD card or a high-speed, high-capacity SDCC card, they should be able to function properly. However, for some special formats or encrypted SD cards, support from the device's own operating system or related software may be required for normal use.

Mini PCI-E device compatibility: When using on different devices, the MINI PCI-E interface specification of the device should be considered. Some devices' MINI PCI-E interfaces may only support specific functions or protocols, in which case certain testing or configuration adjustments may be required to ensure that the converter can function properly. For example, in some laptops, the MINI PCI-E interface may be primarily used to connect wireless network cards, and its BIOS settings or system configuration may impose certain restrictions on the use of other non-standard devices (such as this converter).

Fundamentals of Interface Conversion:

The core of this SD card slot to MINI PCI-E product is to achieve the conversion between two different interface standards. The SD card interface and MINI PCI-E interface have different electrical characteristics, signal protocols, and physical pin definitions.

The SD card interface is mainly used for communication with SD cards, including data pins (for transmitting data), clock pins (providing synchronous clock signals), and control pins (such as command and chip selection signals). For example, data transmission on an SD card is based on clock signal synchronization, and the frequency of the clock signal determines the speed of data transmission.

The MINI PCI-E interface is a high-speed serial interface used to transfer data between device motherboards and various expansion cards (such as wireless network cards, solid-state drives, etc.). It has its own differential signal pair (for high-speed data transmission) and some control signal pins.

Signal conversion process:

When an SD card is inserted into the SD card slot of the converter, the converter first recognizes the insertion status of the SD card. This is achieved through mechanical switches on the SD card slot (to check if the card is inserted) and some basic electrical signal detection.

Then, the chip inside the converter will convert the parallel signals (including data, clock, and control signals) of the SD card interface into the serial signal format required by the MINI PCI-E interface. This process involves the re encoding and modulation of signals. For example, it will package the parallel data of the SD card according to the serial transmission protocol of the MINI PCI-E interface, adding necessary protocol headers and checksum information.

In the direction of data transmission, when reading data from an SD card, the data is transmitted to the signal conversion chip inside the converter through the data pin of the SD card. After processing the data, the chip sends the data to the device's motherboard through differential signal pairs via the MINI PCI-E interface. When writing data to the SD card, the process is the opposite. The data enters the converter from the device motherboard through the MINI PCI-E interface, is processed by the conversion chip, and then written to the SD card through the corresponding pin of the SD card interface.

Protocol adaptation:

The SD card and MINI PCI-E interface follow different communication protocols. The SD card communication protocol specifies the command format, data transfer format, and error handling mechanism. For example, the SD card protocol includes a series of command codes for initializing the SD card, reading and writing data blocks, and other operations.

The chips inside the converter need to understand and adapt to these two protocols. It will convert SD card protocol commands and data requests into operations supported by the MINI PCI-E interface. At the MINI PCI-E end, there may be multiple levels of processing involved, including the transaction layer (TL), data link layer (DL), and physical layer (PH) of the PCI Express protocol. For example, converting SD card read data requests into MINI PCI-e memory read transactions, transmitting them through various levels of the PCI Express protocol, and ultimately achieving data reading from the SD card and providing it to the device for use through the MINI PCI-e interface.

Power management section:

The converter also needs to consider power management. SD cards require a certain power supply to function, usually obtained by a converter from the MINI PCI-E interface of the device, and then provided with appropriate voltage and current to the SD card through an internal power management circuit.

The power management circuit monitors the power consumption of the SD card and can adjust the power supply appropriately when the device enters low-power mode (such as sleep mode or standby mode) to save energy and ensure the safety of the SD card and the entire converter. For example, when the device enters sleep mode, the power management circuit may reduce the power supply voltage of the SD card or cut off some unnecessary power paths until the device returns to normal operation.