USB
9
9.1
USB
USB DC Electrical Characteristics
Table 35. USB DC Electrical Characteristics
Parameter
Symbol
V
IH
V
IL
I
IN
V
OH
V
OL
Min
2
–0.3
—
OV
DD
– 0.2
—
Max
OV
DD
+ 0.3
0.8
±5
—
0.2
Unit
V
V
μA
V
V
This section provides the AC and DC electrical specifications for the USB interface of the MPC8347EA.
provides the DC electrical characteristics for the USB interface.
High-level input voltage
Low-level input voltage
Input current
High-level output voltage, I
OH
= –100
μA
Low-level output voltage, I
OL
= 100
μA
9.2
USB AC Electrical Specifications
Table 36. USB General Timing Parameters (ULPI Mode Only)
Parameter
Symbol
1
t
USCK
t
USIVKH
t
USIXKH
t
USKHOV
t
USKHOX
Min
15
4
1
—
2
Max
—
—
—
7
—
Unit
ns
ns
ns
ns
ns
Notes
2–5
2–5
2–5
2–5
2–5
describes the general timing parameters of the USB interface of the MPC8347EA.
USB clock cycle time
Input setup to USB clock—all inputs
Input hold to USB clock—all inputs
USB clock to output valid—all outputs
Output hold from USB clock—all outputs
Notes:
1. The symbols 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, t
USIXKH
symbolizes USB timing (US) for
the input (I) to go invalid (X) with respect to the time the USB clock reference (K) goes high (H). Also, t
USKHOX
symbolizes
USB timing (US) for the USB clock reference (K) to go high (H), with respect to the output (O) going invalid (X) or output hold
time.
2. All timings are in reference to USB clock.
3. All signals are measured from OV
DD
/2 of the rising edge of the USB clock to 0.4
×
OV
DD
of the signal in question for 3.3 V
signaling levels.
4. Input timings are measured at the pin.
5. For active/float timing measurements, the Hi-Z or off-state is defined to be when the total current delivered through the
component pin is less than or equal to that of the leakage current specification.
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 12
Freescale Semiconductor
35
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
