mcimx27- Freescale Semiconductor, Inc, mcimx27- Datasheet - Page 99

• Manufacturer Part Number: mcimx27-
• Description: Multimedia Applications Processor
• Manufacturer: Freescale Semiconductor, Inc

3.6.14.3
Freescale Semiconductor
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
Parameter
USB_TXOE_B
USB_SE0_VM
USB_DAT_VP
USB_RCV
Name
VP_VM Bidirectional Mode
Table 54. OTG Port Timing Specification in DAT_SE0 Unidirectional Mode
Figure 63. USB Receive Waveform in DAT_SE0 Unidirectional Mode
Table 55. Signal Definitions—VP_VM Bidirectional Mode
USB_SE0_VM
USB_TXOE_B
USB_SE0_VM
USB_SE0_VM
USB_DAT_VP
USB_DAT_VP
USB_DAT_VP
USB_DAT_VP
Signal Name
USB_RCV
USB_VM1
USB_VP1
Preliminary—Subject to Change Without Notice
i.MX27 and i.MX27L Data Sheet, Rev. 1.2
Direction
Out (Tx)
Out (Tx)
In (Rx)
In (Rx)
Out
In
Signal Source
Out
Out
Out
Out
In
In
In
In
In
• 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
• Transmit enable, active low
• Differential RX data
49.0
Min
—
—
—
—
—
—
—
—
Max
51.0
10.0
Signal Description
5.0
5.0
5.0
8.0
3.0
3.0
3.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
%
USB_DAT_VP/
USB_SE0_VM
Reference Signal
Signal Descriptions
USB_TXOE_B
USB_TXOE_B
Condition/
VP, VM,
RCV
50 pF
50 pF
50 pF
35 pF
35 pF
35 pF
—
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