IMX53IEC datasheet(141/173 Pages) FREESCALE

141 / 173 page

Electrical Characteristics

i.MX53 Applications Processors for Industrial Products, Rev. 6

Freescale Semiconductor

141

4.7.19.4

USB PHY Voltage Thresholds

Table 104 lists the USB PHY voltage thresholds.

4.7.19.5

USB PHY Termination

USB driver impedance in FS and HS modes is 45

Ω ±10% (steady state). No external resistors required.

4.8

XTAL Electrical Specifications

Table 105 shows the XTALOSC electrical specifications.

Table 106 shows the XTALOSC_32K electrical specifications.

4.9

Integrated LDO Voltage Regulators Parameters

The PLL supplies VDD_DIG_PLL and VDD_ANA_PLL can be powered ON from internal LDO voltage

regulator (default case). In this case VDD_REG is used as internal regulator’s power source. The

regulator’s output can be used as a supply for other domains such as VDDA and VDDAL1.

Table 107 shows the VDD_DIG_PLL and VDD_ANA_PLL Integrated Voltage Regulators Parameters.

Table 104.

VBUS Comparators Thresholds

Parameter

Conditions

Min

Typ

Max

Unit

A-Device Session Valid

—

0.8

1.4

2.0

B-Device Session Valid

—

0.8

1.4

4.0

B-Device Session End

—

0.2

0.45

0.8

VBUS Valid Comparator Threshold1

1 For VBUS maximum rating, see Table 4 on page 16

—4.4

4.6

4.75

Table 105. XTALOSC Electrical Specifications

Parameter

Min

Typ

Max

Units

Frequency

MHz

Table 106. XTALOSC_32K Electrical Specifications

Parameter

Min

Typ

Max

Units

Frequency

—

32.768/32.01

1 Recommended nominal frequency 32.768 kHz.

—kHz

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