SD Card and Compact Flash Compliance Testing & Solutions

GRL is the leading contributing lab for flash memory interface transition to high-speed serial.

SD Express, UHS-I and UHS-II SD Hosts and Devices

GRL is the lead lab authorized by the SD Association for the SD Express/UHS-II Verification Program to cover the specification of major electrical test items for UHS-II (LVDS) in SD products and PCIe® interface in SD Express products.

Offerings include SD Express/UHS-II compliance, certification and debugging.


We provide following test services for CFA members as CFA designated lab.

  • CF Express Electrical Compliance Test Service
  • CF Express Protocol Compliance Test Service (PCI Express Protocol)
  • CF Express VPG (Video Performance Grade) certification
  • CFast Electrical Compliance Test Service
  • CFast Protocol Compliance Test Service

SD Test



A secure Digital Memory Card, abbreviated as SD, is commonly known as a memory card. The SD interface is widely used in portable devices, such as cameras, video recorders, handheld games, mobile phones, laptops, etc. The latest SD specification is SD 8.0, its transmission interface improves to PCIe 4.0 and adopts NVMe 1.4 protocol. It makes SD Express Card can reach 4GB/s transmission speed. The most used specification also is SD 3.01 and SD 4.0.

For more SD related content, please refer to:


SD Association

SD Association was founded in 2000 and consists of three corporations Matsushita Electric (Panasonic), SanDisk (San Disk), and Toshiba (Toshiba). The members of the SD Association have about 900 companies participating. They are mainly committed to the formulation of SD specifications and the promotion of their application. For more SD Association-related content, please refer to:


The Latest Version of the SD Specification

Please refer to different specifications for each SD test item on the SDA official webpage:


Certification Area

SD test can be executed by the product types below.




Technical Resource

  • Application Note: SD 3.0 / 4.0 Overview


Technical Tools




SD Test Process


SD Test Process



(1) Become a member of the SD Association

Check your membership of SD Association:

If your company is not an SD member yet, please apply for membership:


(2) The types, fees, and rights of SD membership

If your company is still in the R&D stage and needs SD-related specifications, you can prepare the following materials to apply for the Qualification of Temporary Contract (non-member), Email:

  1. Sign an NDA <Click to find it>
  2. Application fee: USD 1,000 (if your company becomes a full member within 90 days after signing the NDA, USD 1,000 can fully deduct the membership fee)

* Membership benefits and fees



(3) Send samples & product information

  • Please provide 2 samples for testing
  • Please provide product information before starting the test. <Download the Form>


(4) Sign the right to use the Logo

After passing the test, your company needs to sign an SD Association License Agreement to be able to use the series of SD Logos.

Please find the document on SDA official webpage:


SD Test Items & Instruments Used


GRL offers the following SD tests



SD Test Equipment

Tx_Specification Test:

  • Keysight scope DSOV334A 33GHz
  • Agilent J-BERT N4903B

Rx_Specification Test:

  • Agilent J-BERT N4903B

Return Loss Test:

  • Keysight E5071C
  • Agilent J-BERT N4903B

Protocol Test:




SD is a trademark of the SD Association.


Membership & Test Process

1. How to check SD Association membership and how to apply for it?

Please check our service page: <SD Test Process>

2. What are the SD membership types, fees, and rights?

Please check our service page: <SD Test Process>

Have official membership and temporary contract 2 types.

3. About SVP Program?

GRL can offer SD Express/UHS-II Validation Program (SVP), which is proposed by SDA. For more information, please visit

Specifications & Preparations

1. How to distinguish the logo and icon on SD card? What are they mean?

The speed grade of the SD card will be divided into three aspects (the higher the number, the faster the speed)

  1. Speed ​​grade:
    • C2 (2MB/sec)
    • C4 (4MB/sec)
    • C6 (6MB/sec)
    • C10 (10MB/sec)
  2. UHS speed class:
    • U1 (10MB/sec)
    • U3 (30MB/sec)
  3. Video speed rating:
    • V6 (6MB/sec)
    • V10 (10MB/sec)
    • V30 (30MB/sec)
    • V60 (60MB/sec)
    • V90 (90MB/sec)



2. Whom can I contact when I have further questions about SD-related?

If you have more questions, please contact: