PCIMX6DP7AYM2AB datasheet(115/160 Pages) NXP

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Electrical Characteristics

i.MX 6DualPlus/6QuadPlus Applications Processors Industrial Products, Rev. 3, 11/2018

NXP Semiconductors

115

4.12.16 SATA PHY Parameters

This section describes SATA PHY electrical specifications.

4.12.16.1 Transmitter and Receiver Characteristics

The SATA PHY meets or exceeds the electrical compliance requirements defined in the SATA

specifications.

NOTE

The tables in the following sections indicate any exceptions to the SATA

specification or aspects of the SATA PHY that exceed the standard, as well

as provide information about parameters not defined in the standard.

The following subsections provide values obtained from a combination of simulations and silicon

characterization.

4.12.16.1.1 SATA PHY Transmitter Characteristics

Table 68 provides specifications for SATA PHY transmitter characteristics.

4.12.16.1.2 SATA PHY Receiver Characteristics

Table 69 provides specifications for SATA PHY receiver characteristics.

4.12.16.2 SATA_REXT Reference Resistor Connection

The impedance calibration process requires connection of reference resistor 191

Ω. 1% precision resistor

on SATA_REXT pad to ground.

Resistor calibration consists of learning which state of the internal Resistor Calibration register causes an

internal, digitally trimmed calibration resistor to best match the impedance applied to the SATA_REXT

pin. The calibration register value is then supplied to all Tx and Rx termination resistors.

During the calibration process (for a few tens of microseconds), up to 0.3 mW can be dissipated in the

external SATA_REXT resistor. At other times, no power is dissipated by the SATA_REXT resistor.

Table 68. SATA PHY Transmitter Characteristics

Parameters

Symbol

Min

Typ

Max

Unit

Transmit common mode voltage

VCTM

0.4

—

0.6

Transmitter pre-emphasis accuracy (measured

change in de-emphasized bit)

—–0.5

—

0.5

Table 69. SATA PHY Receiver Characteristics

Parameters

Symbol

Min

Typ

Max

Unit

Minimum Rx eye height (differential peak-to-peak)

VMIN_RX_EYE_HEIGHT

175

—

Tolerance

PPM

–400

—

400

ppm

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