I.MX27 Datasheet, PDF (99/148 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor

Electrical Characteristics
Table 52. OTG Port Timing Specification in DAT_SE0 Bidirectional Mode
Parameter
TX Rise/Fall Time
TX Rise/Fall Time
TX Rise/Fall Time
TX Duty Cycle
Enable Delay
Disable Delay
RX Rise/Fall Time
RX Rise/Fall Time
Signal Name
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
USB_DAT_VP
In
USB_SE0_VM
49.0
51.0
—
8.0
%
—
ns
USB_TXOE_B
USB_DAT_VP
In
USB_SE0_VM
USB_DAT_VP
In
—
10.0
ns
USB_TXOE_B
—
3.0
ns
35 pF
USB_SE0_VM
In
—
3.0
ns
35 pF
4.3.14.2
DAT_SE0 Unidirectional Mode
Table 53. Signal Definitions—DAT_SE0 Unidirectional Mode
Name
USB_TXOE_B
USB_DAT_VP
USB_SE0_VM
USB_VP1
USB_VM1
USB_RCV
Direction
Out
Out
Out
In
In
In
Signal Description
Transmit enable, active low
TX data when USB_TXOE_B is low.
SE0 drive when USB_TXOE_B is low.
Buffered data on DP when USB_TXOE_B is high.
Buffered data on DM when USB_TXOE_B is high.
Differential RX data when USB_TXOE_B is high.
USB_DAT_VP
USB_SE0_VM
Figure 62. USB Transmit Waveform in DAT_SE0 Unidirectional Mode
i.MX27 and i.MX27L Data Sheet, Rev. 1.5
Freescale Semiconductor
99