MCIMX25 Motorola Semiconductor Products, MCIMX25 Datasheet - Page 117

• Manufacturer Part Number: MCIMX25
• Manufacturer: Motorola Semiconductor Products

Figure 92
Table 89
3.6.20.1.3
Table 90
Freescale Semiconductor
US10
US11
US12
US13
US14
US15
US16
US17
US9
No.
USB_TXOE_B
USB_SE0_VM
USB_DAT_VP
Receive
USB_SE0_VM
USB_DAT_VP
RCV
USB_RCV
shows the USB port timing specification in DAT_SE0 unidirectional mode.
defines the VP_VM bidirectional mode signals.
Name
shows the USB receive waveform in DAT_SE0 unidirectional mode diagram.
VP_VM Bidirectional Mode Timing
Rx rise/fall time
Rx rise/fall time
Rx rise/fall time
Tx rise/fall time
Tx rise/fall time
Tx rise/fall time
Disable Delay
Enable Delay
Tx duty cycle
Table 89. USB Port Timing Specification in DAT_SE0 Unidirectional Mode
Parameter
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 2
Figure 92. USB Receive Waveform in DAT_SE0 Unidirectional Mode
Table 90. Signal Definitions—VP_VM Bidirectional Mode
US13
USB_SE0_VM
USB_TXOE_B
USB_SE0_VM
USB_SE0_VM
USB_DAT_VP
USB_DAT_VP
USB_DAT_VP
USB_DAT_VP
Signal Name
USB_RCV
USB_VM1
USB_VP1
Direction
Out (Tx)
Out (Tx)
In (Rx)
In (Rx)
Out
In
Source
Signal
Out
Out
Out
Out
In
In
In
In
In
US17
• Transmit enable, active low
• Tx VP data when USB_TXOE_B is low
• Rx VP data when USB_TXOE_B is high
• Tx VM data when USB_TXOE_B low
• Rx VM data when USB_TXOE_B high
• Differential Rx data
Min.
49.0
—
—
—
—
—
—
—
—
Max.
51.0
10.0
5.0
5.0
5.0
8.0
3.0
3.0
3.0
Signal Description
US14
Unit
ns
ns
ns
ns
ns
ns
ns
ns
%
Reference Signal
USB_TXOE_B
USB_TXOE_B
Condition/
50 pF
50 pF
50 pF
35 pF
35 pF
35 pF
—
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