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 2010 Microchip Technology Inc. DS39935C-page 79

ENC424J600/624J600

R/W-0 R/W-0 R/W-1 R/W-0 R/W-0 R/W-1 R/W-1 R/W-0

LACFG3 LACFG2 LACFG1 LACFG0 LBCFG3 LBCFG2 LBCFG1 LBCFG0

bit 15 bit 8

R-0R-0R-1RRRRR

DEVID2 DEVID1 DEVID0 REVID4 REVID3 REVID2 REVID1 REVID0

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 15-12,

bit 11-8

LACFG<3:0>: LEDA Configuration bits and

LBCFG<3:0: LEDB Configuration bits

1111 = Display link and speed state, transmit and receive events

(1)

1110 = Display link and duplex state, transmit and receive events

(1)

1101 = Reserved

1100 = Display link state, collision events; pin is driven high when a link is present and driven low

temporarily when a collision occurs

1011 = Display link state, transmit and receive events; pin is driven high when a link is present and

driven low while a packet is being received or transmitted

1010 = Display link state, receive events; pin is driven high when a link is present and driven low while

a packet is being received

1001 = Display link state, transmit events; pin is driven high when a link is present and driven low while

a packet is being transmitted

1000 = Display speed state; pin is driven high when in 100 Mbps mode and a link is present

0111 = Display duplex state; pin is driven high when the PHY is in full duplex (PHYDPX (ESTAT<10>)

is ‘

1’) and a link is present

0110 = Display transmit and receive events; pin is driven high while a packet is either being received

or transmitted

0101 = Display receive events; pin is driven high while a packet is being received

0100 = Display transmit events; pin is driven high while a packet is being transmitted

0011 = Display collision events; pin is temporarily driven high when a collision occurs

0010 = Display link state; pin is driven high when linked

0001 = On (pin is driven high)

0000 = Off (pin is driven low)

bit 7-5

DEVID<2:0>: Device ID bits

001 = ENC624J600 family device

bit 4-0

REVID<4:0>: Silicon Revision ID bits

Indicates current silicon revision.

Note 1: These configurations require that a bi-color LED be connected between the LEDA and LEDB pins, and

that LACFG<3:0> and LBCFG<3:0> be set to the same value. See

Section 2.5.1 “Using Bi-Color

LEDs”

for detailed information.