Pci\ven_1c00&dev_3253&cc_070005 -

If you are encountering this ID in a Device Manager error log:

This is a device, typically found on industrial motherboards, embedded systems, or PCIe add-on cards providing legacy I/O ports. pci\ven_1c00&dev_3253&cc_070005

: The Class Code, where 0700 indicates a serial controller and the 05 subclass specifically identifies a 16550-compatible UART. Why This Appears in Device Manager If you are encountering this ID in a

The device identified by pci\ven_1c00&dev_3253 is a relic of the transition period between dial-up and broadband. While functionally obsolete for general internet usage, it remains a point of interest for legacy hardware enthusiasts or maintenance of older industrial equipment. Proper operation requires the specific Motorola SM56 driver suite, usually sourced from legacy driver archives. While functionally obsolete for general internet usage, it

| OS | Driver | |----|--------| | | Built-in ser2par64.sys (serial/parallel port driver) or pci.sys . May need manual driver update from ASIX website. | | Windows 7/8 | Requires driver from MosChip/ASIX (e.g., MCS3253_W7_x64.inf ). | | Linux | Kernel module 8250_pci or parport_pc with device ID added. Manually modprobe: options 8250_pci vendor=0x1c00 device=0x3253 . | | FreeBSD | puc driver (PCI UART compatibility layer). |

| Vendor | Details | |--------|---------| | (or Silan Integrated Circuit Co., Ltd.) | A Chinese semiconductor company. However, this specific vendor ID is also widely reused by PLX Technology (now part of Broadcom) for bridge devices, and by various third-party PCIe-to-serial/parallel bridge chips under the MCS (MosChip Semiconductor) or Oxford Semiconductor families. |

After checking up-to-date PCI ID repositories: