Rainbow Electronics W90N740 - Manual (Page 6)

W90N740
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External Bus Interface (EBI)
• External I/O Control with 8/16/32 bit external data bus
• Cost-effective memory-to-peripheral DMA interface
• SDRAM Controller supports up to 2 external SDRAM & the maximum size of each device is 32MB
• ROM/FLASH & External I/O interface
• Support for PCMCIA 16-bit PC Card devices
On-Chip Instruction and Data Cache
• Two-way, Set-associative, 8K-byte I-cache and 2K-byte D-cache
• Support for LRU (Least Recently Used) Protocol
• Cache can be configured as an internal SRAM
• Support Cache Lock function
Ethernet MAC Controller (EMC)
• IEEE 802.3 protocol engine with programmable MII or RMII interface for 10/100 Mbits/s
• DMA engine with burst mode
• 256 bytes transmit & 256 bytes receive FIFO for MAC protocol engine and DMA access
• Built-in 16 entry CAM Address Register
• Support long frame (more than 1518 bytes) and short frame (less than 64 bytes)
• Re-transmit (during collision) the frame without DMA access
• Half or full duplex function option
• Support Station Management for external PHY
• On-Chip Pad generation
NAT Accelerator (Patent Pending)
• Hardware acceleration on IP address / port number look up and replacement for network address
translation, including MAC address translation
• Provide 64 entries of translation table
• Support TCP / UDP packets
GDMA Controller
• 2 Channel GDMA for memory-to-memory data transfers without CPU intervention
• Increase or decrease source / destination address in 8-bit, 16-bit, or 32-bit data transfers
• Supports 4-data burst mode to boost performance
• Support external GDMA request