PCIMX515CJM6C datasheet(136/184 Pages) FREESCALE

136 / 184 page

i.MX51 Applications Processors for Consumer and Industrial Products, Rev. 1

136

Freescale Semiconductor

Preliminary—Subject to Change Without Notice

Electrical Characteristics

3.7.19

USB PHY Parameters

3.7.19.1

USB PHY AC Parameters

3.7.19.2

USB PHY Additional Electrical Parameters

3.7.19.3

USB PHY System Clocking (SYSCLK)

Table 106. USB PHY AC Timing Parameters

Parameter

Conditions

Min

Typ

Max

Unit

trise

1.5Mbps

12Mbps

480Mbps

0.5

—

300

tfall

1.5Mbps

12Mbps

480Mbps

0.5

—

300

Jitter

1.5Mbps

12Mbps

480Mbps

——

0.2

Table 107. Additional Electrical Characteristics for USB PHY

Parameter

Conditions

Min

Typ

Max

Unit

Vcm DC

(dc level measured at receiver connector)

HS Mode

LS/FS Mode

–0.05

0.8

—0.5

2.5

Crossover Voltage

LS Mode

FS Mode

1.3

—2

Power supply ripple noise

(analog 3.3 V)

<160 MHz

–50

Power supply ripple noise

(analog 2.5 V)

<1.2 MHz

>1.2 MHz

–10

–50

Power supply ripple noise

(Digital 1.2)

All conditions

–50

Table 108. USB PHY System Clocking Parameters

Parameter

Conditions

Min

Typ

Max

Unit

Clock deviation

—

–150

—

150

ppm

Rise/fall time

—

200

Jitter (peak-peak)

<1.2 MHz

—

Jitter (peak-peak)

>1.2 MHz

—

100

Duty-cycle

—

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