LAN8187 datasheet(45/72 Pages) SMSC

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±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWRTM

Datasheet

SMSC LAN8187/LAN8187I

Revision 1.0 (12-14-06)

DATASHEET

Table 5.36 Register 6 - Auto Negotiation Expansion

ADDRESS

NAME

DESCRIPTION

MODE

DEFAULT

6.15:5

Reserved

6.4

Parallel Detection

Fault

1 = fault detected by parallel detection logic

0 = no fault detected by parallel detection logic

RO/

6.3

Link Partner Next

Page Able

1 = link partner has next page ability

0 = link partner does not have next page ability

6.2

Next Page Able

1 = local device has next page ability

0 = local device does not have next page ability

6.1

Page Received

1 = new page received

0 = new page not yet received

RO/

6.0

Link Partner Auto-

Negotiation Able

1 = link partner has auto-negotiation ability

0 = link partner does not have auto-negotiation ability

Table 5.37 Register 16 - Silicon Revision

ADDRESS

NAME

DESCRIPTION

MODE

DEFAULT

16.15:10

Reserved

16.9:6

Silicon Revision

Four-bit silicon revision identifier.

0001

16.5:0

Reserved

Table 5.38 Register 17 - Mode Control/Status

ADDRESS

NAME

DESCRIPTION

MODE

DEFAULT

17.15:14

Reserved

Write as 0; ignore on read.

17.13

EDPWRDOWN

Enable the Energy Detect Power-Down mode:

0 = Energy Detect Power-Down is disabled

1 = Energy Detect Power-Down is enabled

17.12

Reserved

Write as 0, ignore on read

17.11

LOWSQEN

The Low_Squelch signal is equal to LOWSQEN AND

EDPWRDOWN.

Low_Squelch = 1 implies a lower threshold

(more sensitive).

Low_Squelch = 0 implies a higher threshold

(less sensitive).

17.10

MDPREBP

Management Data Preamble Bypass:

0 – detect SMI packets with Preamble

1 – detect SMI packets without preamble

17.9

FARLOOPBACK

Force the module to the FAR Loop Back mode, i.e. all

the received packets are sent back simultaneously (in

100Base-TX only). This bit is only active in RMII

mode. In this mode the user needs to supply a 50MHz

clock to the PHY. This mode works even if MII Isolate

(0.10) is set.

17.8:7

Reserved

Write as 0, ignore on read.

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