
MPC8313E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4
46
Freescale Semiconductor
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.
This table provides the USB clock input (USB_CLK_IN) DC timing specifications.
This table provides the USB clock input (USB_CLK_IN) AC timing specifications.
Table 42. USB_CLK_IN DC Electrical Characteristics
Parameter
Symbol
Min
Max
Unit
Input high voltage
VIH
2.7
NVDD +0.3
V
Input low voltage
VIL
–0.3
0.4
V
Table 43. USB_CLK_IN AC Timing Specifications
Parameter/Condition
Conditions
Symbol
Min
Typ
Max
Unit
Frequency range
—
fUSB_CLK_IN
—24
48
MHz
Clock frequency tolerance
—
tCLK_TOL
–0.005
0
0.005
%
Reference clock duty cycle
Measured at 1.6 V
tCLK_DUTY
40
50
60
%
Total input jitter/time interval
error
Peak-to-peak value measured with a second
order high-pass filter of 500 kHz bandwidth
tCLK_PJ
——
200
ps
Output Signals
tUSKHOV
USBDR_CLK
Input Signals
tUSIXKH
tUSIVKH
tUSKHOX