O2Micro OZ777/OZ621 Card Reader Drivers 2.2.2.1057
Driver package for Windows 7–8.1, 32-bit & 64-bit. Released Mar 7, 2014.
- Manufacturer
- O2Micro
- Version
- 2.2.2.1057
- Release date
- Mar 7, 2014
- Windows
- Windows 7Windows 8Windows 8.1
- Architecture
- 32-bit & 64-bit
- Size
- 8.5 MB
- Hardware IDs
- 4 supported (see list)
- Category
- Card readers › O2Micro
Download
CardReader_O2Micro_Oz777_2.2.2.1057.zip
How to install
- Check that this is the right driver. Open Device Manager (right-click the Start button), right-click your device, choose Properties and look at "Hardware Ids" on the Details tab. The value should match one of the supported IDs below (more about hardware IDs).
- Extract it to a folder. If the folder contains
setup.exeorinstall.exe, run it as administrator. - If there is no installer, right-click the device in Device Manager, choose Update driver, then "Browse my computer for drivers", select the extracted folder (leave "Include subfolders" ticked) and click Next.
- Restart the computer and check that the device no longer shows a yellow warning sign in Device Manager.
This driver was released for Windows 7–8.1. On Windows 10 and 11 it may refuse to install, or Memory integrity (Windows Security, Device security, Core isolation) may block it. If a newer version is listed under other drivers for this hardware, use that one instead.
Supported hardware IDs
This driver package declares support for 4 device IDs. Open an ID to see every driver available for that device.
| Hardware ID | Device |
|---|---|
| PCI\VEN_1217&DEV_8420 | BayHubTech Integrated MMC/SD controller(Generic) |
| PCI\VEN_1217&DEV_8520 | O2 Micro, Inc. SD/MMC Card Reader Controller |
| PCI\VEN_1217&DEV_8620 | O2Micro Integrated MMC/SD controller |
| PCI\VEN_1217&DEV_8621 | O2Micro Integrated MMC/SD controller |
Other drivers for this hardware
| Driver | Version | Date | Windows |
|---|---|---|---|
| Multicard Reader Driver (Lenovo) | 10.0.26200.21385, 2.1.106.10074 | Aug 24, 2026 | Windows 11 |
| Multicard Reader Driver (Lenovo) | 10.0.26200.21385, 2.1.106.10072 | May 26, 2026 | Windows 11 |
| Multicard Reader Driver (Lenovo) | 2.1.101.10734, 10.0.26200.21385, 1.1.54.0 | Mar 10, 2026 | Windows 11 |
| BayHubTech Integrated MMC/SD controller(Generic) Driver | 2.1.101.10740 | Mar 5, 2026 | Windows 10, 11 |
| Multicard Reader Driver (Lenovo) | 10.0.26200.21385, 2.1.106.10072 | Feb 25, 2026 | Windows 11 |
| Multicard Reader Driver (Lenovo) | 10.0.26200.21385, 2.1.106.10072 | Feb 6, 2026 | Windows 10, 11 |
| Multicard Reader Driver (Lenovo) | 10.0.26200.21385, 2.1.106.10072 | Dec 23, 2025 | Windows 11 |
| BayHubTech Flash Memory Card (Lenovo) | 2.1.101.10734 | Aug 13, 2025 | Windows 10, 11 |
| O2Micro BayHubTech Integrated MMC/SD BH-778 controller Drivers | 2.1.101.10700 | Apr 9, 2024 | Windows 10, 11 |
| O2Micro BayHubTech Integrated MMC/SD BH-778 controller Driver | 2.1.101.10690 | Jan 15, 2024 | Windows 10, 11 |
| O2Micro CR BH-778 Driver | 2.1.101.10670 | Sep 28, 2023 | Windows 10, 11 |
| O2Micro CR BH-778 Driver | 2.1.101.10660 | Jun 25, 2023 | Windows 10, 11 |