PCIe interface
Compatible with PCI Express Base Specification Revision 2.1
Dual operation mode: Root Complex(RC)and End Point(EP)
Maximum link width is 2, single bi-directional Link interface
Maximum Payload Size of 128 bytes
Support 2.5Gbps and 5.0Gbps serial data transmission rate per lane per directi
------- 来自rk1808 datasheet