Datasheet

DP83640
SNOSAY8E –SEPTEMBER 2007–REVISED APRIL 2013 www.ti.com
10.3 Test Registers - Page 1
Page 1 Test Registers are accessible by setting bits [2:0] = 001 of PAGESEL (13h).
10.3.1 Signal Detect Configuration (SD_CNFG), Page 1
This register contains Signal Detect configuration control as well as some test controls to speed up Auto-
neg testing.
Table 10-27. Signal Detect Configuration (SD_CNFG), address 0x1E
Bit Bit Name Default Description
15 RESERVED 1, RW RESERVED: Write as 1, read as 1.
14:1 RESERVED 000, RW RESERVED: Write as 0, read as 0.
2
11 RESERVED 0, RO RESERVED: Write ignored, read as 0.
10:9 RESERVED 00, RW RESERVED: Write as 0, read as 0.
8 SD_TIME 0, RW Signal Detect Time
Setting this bit to a 1 enables a fast detection of loss of Signal Detect.
This will result in a fast loss of Link indication. Approximate times to
detect signal detect deassertion are:
1 = 1 µs
0 = 250 µs
7:0 RESERVED 0000 0000, RW RESERVED: Write as 0, read as 0.
104 Register Block Copyright © 2007–2013, Texas Instruments Incorporated
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