I.MX27L_11 Datasheet, PDF (102/152 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor Multiple clock and power domains

Electrical Characteristics
4.3.14 Serial Interface
In order to support four serial different interfaces, the USBOTG transceiver can be configured to operate
in one of the following modes:
• DAT_SE0 bidirectional, 3-wire mode
• DAT_SE0 unidirectional, 6-wire mode
• 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 64. USB Transmit Waveform in DAT_SE0 Bidirectional Mode
USB_TXOE_B
USB_DAT_VP
USB_SE0_VM
Figure 65. USB Receive Waveform in DAT_SE0 Bidirectional Mode
i.MX27 and i.MX27L Data Sheet, Rev. 1.7
102
Freescale Semiconductor