PCI dual serial and printer port chip CH352
Supplies dual UART or one printer port/parallel interface,used for expand dual RS232 serial,RS485 communication,expand printer port etc based on PCI bus.In addition there are PCI dual UART,PCI quadruple project

USB-H0ST chip of SPI interface CH374
CH374 is SPI or parallel interface USB chip.Based on CH375,the CH374 gets out of command explainer,protocol processor and firmware.Because of reducing middle processes,the speed is higher.It supports USB full-speed 12Mbps and low-speed 1.5Mbps,pins are compatible with CH375

Parallel interface and SPI dual UART chip CH432
The CH432 is a 8-bit dual-channel UART,supports SPI.Its function compatible with 16C450,16C550 and 16C552.Supports hardware stream automatically control,and supports the baud rate up to 4Mbps.It is used to expand high performace UART of MCU system

USB Flash Driver which uses hardware to replace software drive
USB Flash Drive with simulate floppy drive interface,replaces 3.5 inch 1.44 FDD in computer,industrial machine,embedded system and other industrial devices,the software does not need to modify.Don't need extra driver program and other software to support the product