MPC8313ECVRGDFB datasheet(46/100 Pages) FREESCALE

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MPC8313E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2.1

Freescale Semiconductor

USB

10.1.2

USB AC Electrical Specifications

Table 42 describes the general timing parameters of the USB interface.

Figure 34 and Figure 35 provide the AC test load and signals for the USB, respectively.

Figure 34. USB AC Test Load

Figure 35. USB Signals

10.2

On-Chip USB PHY

This section describes the DC and AC electrical specifications for the on-chip USB PHY of the

MPC8313E. See Chapter 7 in the USB Specifications Rev. 2, for more information.

Table 42. USB General Timing Parameters (ULPI Mode Only)

Parameter

Symbol1

Min

Max

Unit

Notes

USB clock cycle time

tUSCK

—

Input setup to USB clock—all inputs

tUSIVKH

4—

input hold to USB clock—all inputs

tUSIXKH

1—

USB clock to output valid—all outputs

tUSKHOV

—7

Output hold from USB clock—all outputs

tUSKHOX

2—

Note:

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

inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tUSIXKH symbolizes USB timing

(USB) for the input (I) to go invalid (X) with respect to the time the USB clock reference (K) goes high (H). Also, tUSKHOX

symbolizes us timing (USB) for the USB clock reference (K) to go high (H), with respect to the output (O) going invalid (X) or

output hold time.

Output

Z0 = 50 Ω

NVDD/2

RL = 50 Ω

Output Signals

tUSKHOV

USBDR_CLK

Input Signals

tUSIXKH

tUSIVKH

tUSKHOX

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