The MB86965B EtherCoupler™ Ethernet Controller is a high–performance, highly integrated monolithic device, a superset of the Fujitsu MB86965A, that incorporates a network controller with buffer management, Manchester encoder/decoder, 10BASE–T transceiver with on–chip transmit and receive filters, and bus interface for a PC/XT/AT/ISA bus. New features of the MB86965B not present in its predecessor, the MB86965A, are summarized below. The EtherCoupler allows implementation of adapter solutions with as few as four chips. With its optional generic bus mode, it is suitable for use directly on a microprocessor bus, local bus or expansion bus.

New Features of the MB86965B EtherCoupler

• Full–duplex capability

• External loopback mode allows testing of all 10BASE–T interface circuits

• Write support for an external Flash boot PROM

• Software Reset now enables the system to fully reset and re–initialize the controller without the need to activate the system reset line

• 24 mA drive capability for IOCHRDY and IOS16 pins to allow direct connection to the ISA bus

ADDITIONAL FEATURES

• Optional, generic host interface to connect to industry– standard microprocessor busses

• Built–in interface for PC/XT/AT or compatible busses

• Interface to serial EEPROM for Node ID and configuration storage allows construction of jumperless, electronically–configurable adapters

• Automatic polarity correction on twisted–pair 10BASE–T receive twisted–pair cable

• Allows automatic selection of non conflicting I/O address for self–installing under software control

• High–performance, packet–buffer architecture pipelines data for highest throughput

• On–chip buffer management controls buffer pointers to reduce software overhead and improve performance

• Hash filter for multicast packet reception

• Manchester encoder/decoder tolerates input jitter up to ±18 ns

• Fully compliant with ISO/ANSI/IEEE 8802–3 specifications

• Two network ports, AUI and 10BASE–T, with automatic port selection

• Integrated pulse shaper, and transmit and receive filters

• Selectable 150 Ω and 100 Ω termination for shielded or unshielded twisted–pair cable, respectively

• Powerdown mode to reduce power dissipation in battery– powered equipment

• Low–power CMOS technology

• Single 5–volt power supply

• 160–pin plastic quad flat package (PQFP)