Add four rs232 serial ports to an embedded system through a mini pci express slot the mpex4s952 4 port rs232 mini pci express serial card 16650 uart turns a mini pcie slot into four rs232 db9 serial ports with data rates up to 9216 kbps a cost saving solution for adding serial support to embedded systems missing the functionality a native pcie single chip design enables you to take advantage of full pci express bus capability by providing improved speed and reliability while redu