General Description
The DM9000B is a fully integrated and cost-effective low pin count single chip Fast Ethernet controller with a general processor interface, a 10/100M PHY and 4K Dword SRAM. It is designed with low power and high performance process interface that support 3.3V with 5V IO tolerance.

FEATUREs
■ Supports processor interface: byte/word of I/O command to internal memory data operation
■ Integrated 10/100M transceiver With HP Auto-MDIX
■ Supports back pressure mode for half-duplex
■ IEEE802.3x flow control for full-duplex mode
■ Supports wakeup frame, link status change and magic packet events for remote wake up
■ Support 100M Fiber interface.
■ Integrated 16K Byte SRAM
■ Build in 3.3V to 1.8V regulator
■ Supports early Transmit
■ Supports IP/TCP/UDP checksum generation and checking
■ Supports automatically load vendor ID and product ID from EEPROM
■ Optional EEPROM configuration
■ Very low power consumption mode:
– Power reduced mode (cable detection)
– Power down mode
– Selectable TX drivers for 1:1 or 1.25:1 transformers for additional power reduction.
■ Compatible with 3.3V and 5.0V tolerant I/O
■ DSP architecture PHY Transceiver.
■ 48-pin LQFP, 0.18 um process