The RTL8351M is a 24-port 10/100M + 4-port 10/100/1000M Managed Ethernet MAC Switch Controller. It supports 3 pairs of 2.5Gbps XSMII and 1 pair QSGMII to connect to external 24 ports Fast Ethernet and 4 ports Gigabit Ethernet PHY transceivers. The mode is 24 10/100BASE-T + 4 combo 10/100/1000BASE-T/SFP.
The RTL8351M is embedded with a up to 700MHz MIPS-34Kc CPU. It supports a 32-bit data bus, 32Mbyte SPI flash (3-byte mode) or 64MB SPI flash (4-byte mode), and 256M-Byte DDR3 SDRAMs (maximum). It is also embedded a 96KB SRAM can be used for time-sensitive application