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PCIMX258CJM4A Datasheet(PDF) 121 Page - Freescale Semiconductor, Inc

Part # PCIMX258CJM4A
Description  i.MX25 Applications Processor for Consumer and Industrial Products
PDF  144 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

PCIMX258CJM4A Datasheet(HTML) 121 Page - Freescale Semiconductor, Inc

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i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 3
Freescale Semiconductor
121
3.7.20.1.4
VP_VM Unidirectional Mode Timing
Table 94 defines the signals for USB in VP_VM unidirectional mode.
Figure 95 shows the USB transmit waveform in VP_VM unidirectional mode diagram.
Figure 95. USB Transmit Waveform in VP_VM Unidirectional Mode
US26
Rx rise/fall time
USB_DAT_VP
In
—
3.0
ns
35 pF
US27
Rx rise/fall time
USB_SE0_VM
In
—
3.0
ns
35 pF
US28
Rx skew
USB_DAT_VP
Out
–4.0
+4.0
ns
USB_SE0_VM
US29
Rx skew
USB_RCV
Out
–6.0
+2.0
ns
USB_DAT_VP
Table 94. Signal Definitions for USB VP_VM Unidirectional Mode
Name
Direction
Signal Description
USB_TXOE_B
Out
Transmit enable, active low
USB_DAT_VP
Out
Tx VP data when USB_TXOE_B is low
USB_SE0_VM
Out
Tx VM data when USB_TXOE_B is low
USB_VP1
In
Rx VP data when USB_TXOE_B is high
USB_VM1
In
Rx VM data when USB_TXOE_B is high
USB_RCV
In
Differential Rx data
Table 93. USB Port Timing Specifications in VP_VM Bidirectional Mode (continued)
No.
Parameter
Signal Name
Direction
Min.
Max.
Unit
Condition/
Reference Signal
USB_DAT_VP
USB_SE0_VM
US30
US31
Transmit
USB_TXOE_B
US32
US34
US33



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