DESCRIPTION

The MB86967 is a highly-integrated, high-performance single-chip Ethernet LAN controller which contains a PC card interface based on the JEIDA4.2 standard, an ISA bus interface that can be connected directly to the ISA bus, a general-purpose bus interface, a Manchester encoder/decoder based on the IEEE802.3 standard, and 10BASE-T transceiver.

The LAN controller and buffer manager are software compatible with the MB86965A and MB86964. The buffer manager has functions for arbitration and buffer management of external buffer memory (SRAM) which can be expanded to 32 KB. These functions provide simultaneous access from the host and data link controller and updating of transmit and receive buffer pointers. This permits substantial reduction of software overhead in buffer management.

■ FEATURES

System Interface

• Allows switching between PC card interface, ISA bus interface, and general-purpose bus interface

• Allows byte swapping of word data according to host CPU (in ISA bus mode and general-purpose bus mode)

• Has functions for high-speed burst DMA transfer and single DMA transfer (slave operation) (in ISA bus mode and general-purpose bus mode)

• Provides node ID EEPROM interface (in ISA bus mode)

• Allows software setting of I/O addresses and interrupt signals (in jumperless mode of ISA bus mode)

• Can be connected to 8-bit and 16-bit standard microprocessor buses (in general-purpose bus mode)

• Provides JEIDA protocol interface (in PC card mode)

• Has overlapping address window function (in PC card mode)

• Has memory control (common memory, attribute memory, I/O addresses) (in PC card mode)

LAN Interface

• Contains Manchester encoder/decoder based on IEEE802.3 standard and 10BASE-T transceiver

• Has functions for jabber control, link test, and SQE test

• Has functions for inversion detection and automatic correction

• Contains LED driver for monitoring network status (link test, collision, transmitting and receiving)

• Has function for 10BASE-T external loopback (full-duplex)

Controller

• Software compatible with MB86965A and MB86964

• Has dual-bank transmit buffer and ring receive buffer (expandable to 32 KB) set by program

• Contains 64-bit hash table for multicast address filter

• Has function for removing receive long packets (1792-byte or more receive packets)

• Has two power-down modes; standby mode (continued crystal oscillation) and shut-down mode (stopped crystal oscillation)

Others

• Aluminum two-layer wiring CMOS technology

• 100-pin LQFP package

• Power-supply voltage of 5 V ±5