XR21B1422 2-channel UART
USB ID 04e2:1422 · Exar Corp.
| Vendor | Exar Corp. |
|---|---|
| Vendor ID | 04e2 |
| Device ID | 1422 |
| Windows hardware ID | USB\VID_04E2&PID_1422 |
| Linux modalias | usb:v04E2p1422 |
| Linux driver | cdc_acm and xr_serial |
Frequently asked questions
Which device has USB ID 04e2:1422?
USB ID 04e2:1422 is “XR21B1422 2-channel UART” made by Exar Corp. (vendor ID 04e2, device ID 1422).
Which Linux driver supports XR21B1422 2-channel UART?
In Linux kernel 6.12 the device is matched by the drivers cdc_acm and xr_serial (source under drivers/usb/class and drivers/usb/serial). The right driver is normally loaded automatically when the device is detected.
How do I check whether XR21B1422 2-channel UART is in my computer?
On Linux, lsusb -d 04e2:1422 shows the device if it is present. On Windows, open Device Manager, then Properties → Details → Hardware Ids; it appears as USB\VID_04E2&PID_1422.
How do I see which driver is currently in use?
lsusb -t prints the device tree with the bound driver (Driver=…) for each interface.