M21050 datasheet(44/70 Pages) MA-COM

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Mindspeed Technologies™

21050-DSH-001-F

Mindspeed Proprietary and Confidential

M21050 Data Sheet

2.2.6

Input Equalization Control for Output N

Table 2-31. Input Equalization Control for Output N (Ineq_ctrl_N: Address M5h)

Bits

Type

Default

Label

Description

R/W

Reserved

N/A

6:5

R/W

00b

MSPD internal

N/A

R/W

en_DCservo

Enables DC servo in the input channel to remove offset based

deterministic jitter

0b: DC servo Dj attenuator off

1b: DC servo Dj attenuator on

3, 1:0

R/W

000b

in_eq

Selects the input equalization level

111b: Maximum input equalization level

100b: Nominal input equalization level

001b: Minimum input equalization level

000b: Input equalization disabled

Note: The 100b setting is optimized for PCB trace lengths between 10 -

46 inches, although other settings may be optimal for some

applications. Bit 2 must be set to zero.

R/W

en_ad_eq

This bit is used to select adaptive input equalization (AIE) over

configurable input equalization (IE).

When AIE is selected, bits [3, 1:0] have no effect.

0b: Disable AIE

1b: Enable AIE

Note: Whenever possible, configurable IE should be selected over AIE

since configurable IE performance is more consistent across devices.

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