LM2512A

MPL-1

DES

MDO

MD1

MC

MD2

MDO

MD1

MC

MD2

MD3 (NC)

LM2512A

FPD95320,

DES

MDO (NC)

MD1

MC

MD2

MD0

MC

MD1

MPL-1

DES

MD1

MC

MD2

LM2512A

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SNLS269B – AUGUST 2007 – REVISED MAY 2013

Take care in reviewing the MPL signals and serial bit mapping to ensure proper connection between the devices.

Figure 20. Application Configurations

LM2512A OPERATION

POWER SUPPLIES

powers the logic interface and may be powered between 1.6V and 3.0V to be compatible with a wide range of

host and target devices.

BYPASS RECOMMENDATIONS

Bypass capacitors should be placed near the power supply pins of the device. Use high frequency ceramic

(surface mount recommended) 0.1 µF capacitors. A 2.2 to 4.7 µF Tantalum capacitor is recommended near the

resistance and inductance of the feeds. Utilizing a thin spacing between power and ground planes will provide

good high frequency bypass above the frequency range where most typical surface mount capacitors are less

effective. To gain the maximum benefit from this, low inductance feed points are important. Also, adjacent signal

layers can be filled to create additional capacitance. Minimize loops in the ground returns also for improved

signal fidelity and lowest emissions.

UNUSED/OPEN PINS

Unused inputs must be tied to the proper input level—do not float them.

PHASE-LOCKED LOOP

A PLL is enabled to generate the serial link clock. The Phase-locked loop system generates the serial data clock

at 4X or 6X of the input clock depending upon the number of MD Lanes selected. The MC rate is limited to 80

MHz for this enhanced Class 0 MPL PHY.

POWER DOWN/OFF CONFIGURATION / OPTIONS AND CLOCK STOP

The LM2512A (SER) can be controlled by it’s PD* input pin or via a auto power down mode that monitors the

PCLK input signal.

For PD* Input Power Down control, a GPO signal from the host is used to enable and disable the LM2512A and

the DES. The LM2512A is enabled when the PD* input is High and disabled when the PD* input is Low.

Copyright © 2007–2013, Texas Instruments Incorporated

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