Usb - Freescale Semiconductor MPC8358E Hardware Specificftion

20 USB

This section provides the AC and DC electrical specifications for the USB interface of the
MPC8360E/58E.
20.1 USB DC Electrical Characteristics
Table 64 provides the DC electrical characteristics for the USB interface.
High-level input voltage
Low-level input voltage
High-level output voltage, I
Low-level output voltage, I
OL
Input current
20.2 USB AC Electrical Specifications
Table 65 describes the general timing parameters of the USB interface of the device.
Parameter
USB clock cycle time
USB clock cycle time
Skew between TXP and TXN
Skew among RXP, RXN, and RXD
Skew among RXP, RXN, and RXD
Notes:
1. The symbols used for timing specifications follow the pattern of t
and t
(first two letters of functional block)(state)(signal)
USB receive signals skew (RS) among RXP, RXN, and RXD (PND). Also, t
transmit signals skew (TS) between TXP and TXN (PN).
2.Skew measurements are done at OV
Figure 52 provide the AC test load for the USB.
MPC8360E/MPC8358E PowerQUICC II Pro Processor Revision 2.x TBGA Silicon Hardware Specifications, Rev. 4
Freescale Semiconductor
Table 64. USB DC Electrical Characteristics
Parameter
= –100 μA
OH
= 100 μA
Table 65. USB General Timing Parameters
Symbol
t
for transmit signals. For example, t
/2 of the rising or falling edge of the signals.
DD
= 50 Ω
Output
Z
0
Figure 52. USB AC Test Load
Symbol
V
IH
V
IL
V
OH
V
OL
I
IN
1
Min
t 20.83
USCK
t 166.67
USCK
t —
USTSPN
—
USRSPND
t —
USRPND
(first two letters of functional block)(state)(signal)
USTSPN
= 50 Ω
R
L
Min Max
2 OV
DD
–0.3 0.8
OV – 0.4 —
DD
— 0.2
— ±10
Max Unit
— ns Full speed 48 MHz
— ns Low speed 6 MHz
5 ns —
10 ns Full speed transitions
100 ns Low speed transitions
for receive signals
symbolizes USB timing (US) for the
USRSPND
symbolizes USB timing (US) for the USB
OV /2
DD
USB
Unit
+ 0.3 V
V
V
V
μA
Notes
67