I.MX27 Datasheet, PDF (98/148 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor

Electrical Characteristics
• VP_VM bidirectional, 4-wire mode
• VP_VM unidirectional, 6-wire mode
4.3.14.1 DAT_SE0 Bidirectional Mode
Table 51. Signal Definitions—DAT_SE0 Bidirectional Mode
Name
USB_TXOE_B
USB_DAT_VP
USB_SE0_VM
Direction
Out
Out
In
Out
In
Signal Description
• Transmit enable, active low
• TX data when USB_TXOE_B is low
• Differential RX data when USB_TXOE_B is high
• SE0 drive when USB_TXOE_B is low
• SE0 RX indicator when USB_TXOE_B is high
USB_DAT_VP
USB_SE0_VM
Figure 60. USB Transmit Waveform in DAT_SE0 Bidirectional Mode
USB_TXOE_B
USB_DAT_VP
USB_SE0_VM
Figure 61. USB Receive Waveform in DAT_SE0 Bidirectional Mode
i.MX27 and i.MX27L Data Sheet, Rev. 1.5
98
Freescale Semiconductor