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i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 9
118 Freescale Semiconductor
Figure 90 shows the USB receive waveform in DAT_SE0 bidirectional mode diagram.
Figure 90. USB Receive Waveform in DAT_SE0 Bidirectional Mode
Table 91 shows the OTG port timing specification in DAT_SE0 bidirectional mode.
3.7.20.1.2 DAT_SE0 Unidirectional Mode Timing
Table 92 defines the DAT_SE0 unidirectional mode signals.
Table 91. OTG Port Timing Specification in DAT_SE0 Bidirectional Mode
No. Parameter Signal Name Direction Min. Max. Unit
Conditions/
Reference Signal
US1 Tx rise/fall time USB_DAT_VP Out 5.0 ns 50 pF
US2 Tx rise/fall time USB_SE0_VM Out 5.0 ns 50 pF
US3 Tx rise/fall time USB_TXOE_B Out 5.0 ns 50 pF
US4 Tx duty cycle USB_DAT_VP Out 49.0 51.0 %
US5 Enable Delay USB_DAT_VP
USB_SE0_VM
In 8.0 ns USB_TXOE_B
US6 Disable Delay USB_DAT_VP
USB_SE0_VM
In 10.0 ns USB_TXOE_B
US7 Rx rise/fall time USB_DAT_VP In 3.0 ns 35 pF
US8 Rx rise/fall time USB_SE0_VM In 3.0 ns 35 pF
Table 92. Signal Definitions—DAT_SE0 Unidirectional Mode
Name Direction Signal Description
USB_TXOE_B Out Transmit enable, active low
USB_DAT_VP Out Tx data when USB_TXOE_B is low
USB_SE0_VM Out SE0 drive when USB_TXOE_B is low
USB_VP1 In Buffered data on DP when USB_TXOE_B is high
USB_VM1 In Buffered data on DM when USB_TXOE_B is high
USB_RCV In Differential Rx data when USB_TXOE_B is high
US6
US7/US8
US5
USB_DAT_VP
USB_SE0_VM
USB_TXOE_B
Receive
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