LAN9220 Datasheet, PDF (14/150 Pages) SMSC Corporation – 16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support

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16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
Datasheet
Host Bus Interface (SRAM Interface)
The host bus interface provides a FIFO interface for the transmit and receive data paths, as well as
an interface for the LAN9220 Control and Status Registers (CSR’s).
The host bus interface is the primary bus for connection to the embedded host system. This interface
models an asynchronous SRAM. TX FIFO, RX FIFO, and CSR’s are accessed through this interface.
Programmed I/O transactions are supported.
The LAN9220 host bus interface supports 16-bit bus transfers. Internally, all data paths are 32-bits
wide. The LAN9220 can be interfaced to either Big-Endian or Little-Endian processors and includes
mixed endian support for FIFO accesses.
Revision 2.6 (12-04-08)
14
DATASHEET
SMSC LAN9220