AM79C976 datasheet(159/309 Pages) AMD

159 / 309 page

8/01/00

Am79C976

159

P R E L I M INARY

/(' &RQWURO5HJLVWHU

Offset 0E2h

This register controls the function(s) that the LED1 pin

displays. Multiple functions can be simultaneously en-

abled on this LED pin. The LED display will indicate the

logical OR of the enabled functions. This register de-

faults to transmit or receive activity (XMTE = 1 and

RCVE = 1) with pulse stretcher enabled (PSE = 1) and

is fully programmable.

All bits in this register are restored to their default val-

ues when the RST pin is asserted, before the serial

EEPROM is read, and after a serial EEPROM read er-

ror.

This register is an alias of BCR5.

The functions of the bits in this register are identical to

those of the LED0 Control Register, except that for this

PSE bits is 1, and the default value for all other bits is 0.

/(' &RQWURO5HJLVWHU

Offset 0E4h

This register controls the function(s) that the LED2 pin

displays. Multiple functions can be simultaneously en-

abled on this LED pin. The LED display will indicate the

logical OR of the enabled functions. This register de-

faults to 100 Mb/s speed indication (100E = 1) with

pulse stretcher enabled (PSE = 1) and is fully program-

mable.

All bits in this register are restored to their default val-

ues when the RST pin is asserted, before the serial

EEPROM is read, and after a serial EEPROM read

error.

This register is an alias of BCR6.

The functions of the bits in this register are identical to

those of the LED0 Control Register, except that for this

1, and the default value for all other bits is 0.

/(' &RQWURO5HJLVWHU

Offset 0E6h

This register controls the function(s) that the LED3 pin

displays. Multiple functions can be simultaneously en-

abled on this LED pin. The LED display will indicate the

logical OR of the enabled functions. This register de-

faults to collision indication (COLE = 1) with pulse

stretcher enabled (PSE = 1) and is fully programmable.

All bits in this register are restored to their default val-

ues when the RST pin is asserted, before the serial

EEPROM is read, and after a serial EEPROM read er-

ror.

This register is an alias of BCR7.

The functions of the bits in this register are identical to

those of the LED0 Control Register, except that for this

1, and the default value for all other bits is 0.

RCVME

Receive Match Status Enable. When this bit is set, a value of 1 is passed to the LEDOUT bit in this

for this node. All address matching modes are included: physical, logical filtering, broadcast and

promiscuous.