I.MX27L_11 Datasheet, PDF (104/152 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor Multiple clock and power domains

Electrical Characteristics
USB_DAT_VP/
USB_SE0_VM
VP, VM,
RCV
Figure 67. USB Receive Waveform in DAT_SE0 Unidirectional Mode
Table 54. OTG Port Timing Specification in DAT_SE0 Unidirectional 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
RX Rise/Fall Time
Signal Name Signal Source
Min
Max
Unit
Condition/
Reference Signal
USB_DAT_VP
Out
USB_SE0_VM
Out
USB_TXOE_B
Out
USB_DAT_VP
Out
USB_DAT_VP
In
USB_SE0_VM
USB_DAT_VP
In
USB_SE0_VM
USB_VP1
In
USB_VM1
In
USB_RCV
In
—
5.0
—
5.0
—
5.0
49.0
51.0
—
8.0
—
10.0
—
3.0
—
3.0
—
3.0
ns
50 pF
ns
50 pF
ns
50 pF
%
—
ns
USB_TXOE_B
ns
USB_TXOE_B
ns
35 pF
ns
35 pF
ns
35 pF
4.3.14.3
VP_VM Bidirectional Mode
Table 55. Signal Definitions—VP_VM Bidirectional Mode
Name
USB_TXOE_B
USB_DAT_VP
USB_SE0_VM
USB_RCV
Direction
Out
Out (Tx)
In (Rx)
Out (Tx)
In (Rx)
In
Signal Description
• Transmit enable, active low
• TX VP data when USB_TXOE_B is low
• RX VP data when USB_TXOE_B is high
• TX VM data when USB_TXOE_B low
• RX VM data when USB_TXOE_B high
• Differential RX data
i.MX27 and i.MX27L Data Sheet, Rev. 1.7
104
Freescale Semiconductor