Datasheet

Electrical Characteristics
i.MX 6Dual/6Quad Applications Processors for Industrial Products, Rev. 6, 11/2018
NXP Semiconductors 113
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 V
CTM
0.4 — 0.6 V
Transmitter pre-emphasis accuracy (measured
change in de-emphasized bit)
—–0.5—0.5dB
Table 69. SATA PHY Receiver Characteristics
Parameters Symbol Min Typ Max Unit
Minimum Rx eye height (differential peak-to-peak) V
MIN_RX_EYE_HEIGHT
175 — — mV
Tolerance PPM –400 — 400 ppm