Date: October 2023 (Updated Analysis) Target Device: USB Mass Storage / Multi-Card Reader Key Identifiers: Vendor ID 058F (Alcor Micro), Product ID 3613 , Firmware Version FA00 , Hardware Revision F/W 3613
If you have a soldered-in laptop card reader exhibiting the "unknown device," it is almost certainly a , not a dead chip. Laptop OEMs (Dell, HP, Lenovo) often use these Alcor chips for SD card slots. 4. The Great Firmware Debate: Should you flash F/W 3613? Let's address the elephant in the room: "Should I update the firmware?" alcor micro unknown fa00 f w 3613 updated
Why? Because the is a relatively late firmware revision for this chip family. Most public drivers available on the internet (versions 1.0.6.0, 1.0.19.0, etc.) were written for older firmware like 3510 or 3520. When Windows queries the chip and receives "FA00 F/W 3613," the older driver's INF file does not contain a matching hardware ID. Hence, "Unknown Device." Date: October 2023 (Updated Analysis) Target Device: USB
| Symptom | Likely Cause | Fix Difficulty | | :--- | :--- | :--- | | | Missing INF driver or corrupted USB descriptors. | Easy to Medium | | Shows "Alcor Micro..." but with a yellow exclamation | Driver loaded but failed to start (Code 10) — often firmware hang. | Medium | | Recognizes SD card but fails to format | Bad firmware handshake; the device times out. | Medium to Hard | | Device disconnects/reconnects constantly | Power management issue or failing capacitor on the reader board. | Hardware | | No response at all; "Device Descriptor Request Failed" | Dead chip or shorted pins in the card slot. | Hardware (Replace reader) | The Great Firmware Debate: Should you flash F/W 3613
If you have arrived at this article, you are likely staring at a device manager screen showing the cryptic string (sometimes labelled as "Unknown Device" or with a yellow exclamation mark). You have been searching for the "updated" version of drivers or firmware, or perhaps you just bought a cheap USB 3.0 card reader that refuses to work.