MCIMX257CJM4 Freescale, MCIMX257CJM4 Datasheet - Page 122

• Manufacturer Part Number: MCIMX257CJM4
• Manufacturer: Freescale

Specifications of MCIMX257CJM4

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

3.7.20.1.4
Table 96
Figure 95
122
US26
US27
US28
US29
No.
Transmit
USB_SE0_VM
USB_DAT_VP
USB_TXOE_B
USB_TXOE_B
USB_SE0_VM
USB_DAT_VP
USB_VM1
USB_RCV
USB_VP1
defines the signals for USB in VP_VM unidirectional mode.
shows the USB transmit waveform in VP_VM unidirectional mode diagram.
Name
Table 95. USB Port Timing Specifications in VP_VM Bidirectional Mode (continued)
VP_VM Unidirectional Mode Timing
Rx rise/fall time
Rx rise/fall time
Parameter
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 7
Rx skew
Rx skew
Figure 95. USB Transmit Waveform in VP_VM Unidirectional Mode
Table 96. Signal Definitions for USB VP_VM Unidirectional Mode
US33
Direction
USB_SE0_VM
USB_DAT_VP
USB_DAT_VP
Out
Out
Out
Signal Name
In
In
In
USB_RCV
Transmit enable, active low
Tx VP data when USB_TXOE_B is low
Tx VM data when USB_TXOE_B is low
Differential Rx data
Rx VP data when USB_TXOE_B is high
Rx VM data when USB_TXOE_B is high
Direction
Out
Out
US30
In
In
US34
Min.
–6.0
–4.0
—
—
US32
Signal Description
Max.
+2.0
+4.0
3.0
3.0
Unit
ns
ns
ns
ns
Freescale Semiconductor
US31
Reference Signal
USB_SE0_VM
USB_DAT_VP
Condition/
35 pF
35 pF