MPC8569E datasheet(116/127 Pages) FREESCALE

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MPC8569E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1

USB Interface

Freescale Semiconductor

116

2.21

USB Interface

This section provides the AC and DC electrical specifications for the USB interface of the MPC8569E.

2.21.1

USB DC Electrical Characteristics

The following table provides the USB DC electrical characteristics.

2.21.2

USB AC Electrical Specifications

The following table describes the general USB timing specifications.

Table 78. USB DC Electrical Characteristics

For recommended operating conditions, see Table 3

Parameter

Symbol

Min

Max

Unit

Notes

Input high voltage

VIH

2—

Input low voltage

VIL

—0.8

Input current (OVIN = 0 V or OVIN = OVDD)IIN

—±40

μA2

Output high voltage (OVDD = min, IOH = –2 mA)

VOH

2.8

—

Output low voltage (OVDD = min, IOL = 2 mA)

VOL

—0.3

—

Differential input sensitivity

VDI

0.2

—

Differential common mode range

VCM

0.8

2.5

Note:

1. The min VILand max VIH values are based on the respective min and max OVIN values found in Table 3.

2. The symbol OVIN represents the input voltage of the supply. It is referenced in Table 3.

3. Applies to low/full speed

Table 79. USB General Timing Parameters

For recommended operating conditions, see Table 3

Parameter

Symbol1

Min

Max

Unit

Notes

USB clock cycle time

tUSCK

20.83

—

Full speed 48 MHz

USB clock cycle time

tUSCK

166.67

—

Low speed 6 MHz

Skew between TXP and TXN

tUSTSPN

—5

Skew among RXP, RXN, and RXD

tUSRSPND

—

Full-speed transitions,

Skew among RXP, RXN, and RXD

tUSRPND

—

100

Low-speed transitions,

Notes:

1. The symbols used for timing specifications follow the pattern t(first two letters of functional block)(state)(signal) for receive signals and

t(first two letters of functional block)(state)(signal) for transmit signals. For example, tUSRSPND symbolizes USB timing (US) for the USB

receive signals skew (RS) among RXP, RXN, and RXD (PND). Also, tUSTSPN symbolizes USB timing (US) for the USB

transmit signals skew (TS) between TXP and TXN (PN).

2. Skew measurements are done at OVDD/2 of the rising or falling edge of the signals.

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