MCIMX255AJM4A Freescale, MCIMX255AJM4A Datasheet - Page 118

• Manufacturer Part Number: MCIMX255AJM4A
• Manufacturer: Freescale

Specifications of MCIMX255AJM4A

• Lead Free Status / RoHS Status: Compliant

Figure 92
Table 91
3.7.20.1.3
Table 92
118
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
Tx rise/fall time
Tx rise/fall time
Tx rise/fall time
Rx rise/fall time
Disable Delay
Tx duty cycle
Enable Delay
Table 91. USB Port Timing Specification in DAT_SE0 Unidirectional Mode
Parameter
Figure 92. USB Receive Waveform in DAT_SE0 Unidirectional Mode
i.MX25 Applications Processor for Automotive Products, Rev. 4
Table 92. 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_VM1
USB_RCV
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
%
Freescale Semiconductor
Reference Signal
USB_TXOE_B
USB_TXOE_B
Condition/
50 pF
50 pF
50 pF
35 pF
35 pF
35 pF
—