IMX53CEC datasheet(146/204 Pages) FREESCALE

146 / 204 page

i.MX53xD Applications Processors for Consumer Products, Rev. 2

146

Freescale Semiconductor

Electrical Characteristics

4.7.19.4

USB PHY Voltage Thresholds

Table 105 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 106 shows the XTALOSC electrical specifications.

Table 107 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 108 shows the VDD_DIG_PLL and VDD_ANA_PLL Integrated Voltage Regulators Parameters.

Table 105.

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 18

—4.4

4.6

4.75

Table 106. XTALOSC Electrical Specifications

Parameter

Min

Typ

Max

Units

Frequency

MHz

Table 107. 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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