DP83848JSQSLASHNOPB datasheet(63/84 Pages) TI1

63 / 84 page

DP83848H, DP83848J, DP83848K, DP83848M, DP83848T

www.ti.com

SNLS250E – MAY 2008 – REVISED APRIL 2015

Table 6-26. CD Test and BIST Extensions Register (CDCTRL1), address 0x1B (continued)

Bit

Bit Name

Default

Description

10MEG_PATT

0, RW

Defines gap between data or NLP test sequences:

_GAP

1 = 15 µs.

0 = 10 µs.

1:0

CDPATTSEL[1:0]

00, RW

CD Pattern Select[1:0]:

If CDPATTEN_10 = 1:

00 = Data, EOP0 sequence

01 = Data, EOP1 sequence

10 = NLPs

11 = Constant Manchester 1 s (10-MHz sine wave) for harmonic distortion testing.

6.6.1.2.10 Energy Detect Control (EDCR)

Table 6-27. Energy Detect Control (EDCR), address 0x1D

Bit

Bit Name

Default

Description

ED_EN

0, RW

Energy Detect Enable:

Allow Energy Detect Mode.

When Energy Detect is enabled and Auto-Negotiation is disabled through the BMCR

ED_AUTO_UP

1, RW

Energy Detect Automatic Power Up:

Automatically begin power-up sequence when Energy Detect Data Threshold value

(EDCR[3:0]) is reached. Alternatively, device could be powered up manually using the

ED_MAN bit (ECDR[12]).

ED_AUTO_DOWN

1, RW

Energy Detect Automatic Power Down:

Automatically begin power-down sequence when no energy is detected. Alternatively,

device could be powered down using the ED_MAN bit (EDCR[12]).

ED_MAN

0, RW/SC

Energy Detect Manual Power Up/Down:

Begin power-up/down sequence when this bit is asserted. When set, the Energy Detect

algorithm will initiate a change of Energy Detect state regardless of threshold (error or

data) and timer values.

ED_BURST_DIS

0, RW

Energy Detect Bust Disable:

Disable bursting of energy detect data pulses. By default, Energy Detect (ED) transmits

a burst of 4 ED data pulses each time the CD is powered up. When bursting is

disabled, only a single ED data pulse will be send each time the CD is powered up.

ED_PWR_STATE

0, RO

Energy Detect Power State:

Indicates current Energy Detect Power state. When set, Energy Detect is in the

powered up state. When cleared, Energy Detect is in the powered down state. This bit

is invalid when Energy Detect is not enabled.

ED_ERR_MET

0, RO/COR

Energy Detect Error Threshold Met:

No action is automatically taken upon receipt of error events. This bit is informational

only and would be cleared on a read.

ED_DATA_MET

0, RO/COR

Energy Detect Data Threshold Met:

The number of data events that occurred met or surpassed the Energy Detect Data

Threshold. This bit is cleared on a read.

7:4

ED_ERR_COUNT

0001, RW

Energy Detect Error Threshold:

Threshold to determine the number of energy detect error events that should cause the

device to take action. Intended to allow averaging of noise that may be on the line.

Counter will reset after approximately 2 seconds without any energy detect data

events.

3:0

ED_DATA_COUNT

0001, RW

Energy Detect Data Threshold:

Threshold to determine the number of energy detect events that should cause the

device to take actions. Intended to allow averaging of noise that may be on the line.

Counter will reset after approximately 2 seconds without any energy detect data

events.

Detailed Description

Submit Documentation Feedback

Product Folder Links: DP83848H DP83848J DP83848K DP83848M DP83848T

DP83848JSQ/NOPB датащи(PDF) 63 Page - Texas Instruments

DP83848JSQ/NOPB датащи(HTML) 63 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84

датащи скачать

ссылки URL