I.MX27 Datasheet, PDF (104/148 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor

Electrical Characteristics
Table 58. USB Timing Specification in VP_VM Unidirectional Mode
Parameter
TX Rise/Fall Time
TX Rise/Fall Time
TX Rise/Fall Time
TX Duty Cycle
TX High Overlap
TX Low Overlap
Enable Delay
Disable Delay
RX Rise/Fall Time
RX Rise/Fall Time
RX Skew
RX Skew
Signal
Direction
Min
Max
Unit
Conditions/
Reference Signal
USB_DAT_VP
Out
USB_SE0_VM
Out
USB_TXOE_B
Out
—
5.0
ns
—
5.0
ns
—
5.0
ns
50 pF
50 pF
50 pF
USB_DAT_VP
Out
49.0
51.0
%
—
USB_SE0_VM
Out
0.0
—
ns
USB_DAT_VP
USB_SE0_VM
Out
USB_DAT_VP
In
USB_SE0_VM
—
0.0
ns
USB_DAT_VP
—
8.0
ns
USB_TXOE_B
USB_DAT_VP
In
USB_SE0_VM
USB_VP1
In
—
10.0
ns
USB_TXOE_B
—
3.0
ns
35 pF
USB_VM1
In
—
3.0
ns
35 pF
USB_VP1
USB_RCV
Out
–4.0
+4.0
ns
USB_SE0_VM
Out
–6.0
+2.0
ns
USB_DAT_VP
i.MX27 and i.MX27L Data Sheet, Rev. 1.5
104
Freescale Semiconductor