IMX53CEC datasheet(136/204 Pages) FREESCALE

136 / 204 page

i.MX53xD Applications Processors for Consumer Products, Rev. 2

136

Freescale Semiconductor

Electrical Characteristics

4.7.18

USB-OH-3 Parameters

This section describes the electrical parameters of the USB OTG port and USB HOST ports. For on-chip

USB PHY parameters see Section 4.7.19, “USB PHY Parameters.”

4.7.18.1

Serial Interface

In order to support four serial different interfaces, the USB serial transceiver can be configured to operate

in one of four 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

4.7.18.1.1

DAT_SE0 Bidirectional Mode

Figure 89. USB Transmit Waveform in DAT_SE0 Bidirectional Mode

Table 92. Signal Definitions - DAT_SE0 Bidirectional 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

Differential RX data when USB_TXOE_B is high

USB_SE0_VM

Out

SE0 drive when USB_TXOE_B is low

SE0 RX indicator when USB_TXOE_B is high

USB_DAT_VP

USB_SE0_VM

US1

US2

Transmit

US4

USB_TXOE_B

US3

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