MCIMX255AJM4AR2 Freescale Semiconductor, MCIMX255AJM4AR2 Datasheet - Page 123

• Manufacturer Part Number: MCIMX255AJM4AR2
• Description: Processors - Application Specialized IMX25 1.2 AUTO
• Manufacturer: Freescale Semiconductor

Specifications of MCIMX255AJM4AR2

• Core: ARM926EJ-S
• Processor Series: MCIMX25
• Maximum Clock Frequency: 400 MHz
• Instruction / Data Cache Memory: 16 KB
• Data Ram Size: 128 KB
• Operating Supply Voltage: 1.15 V to 1.52 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: MAPBGA-400
• Interface Type: USB
• Memory Type: DDR2
• Minimum Operating Temperature: - 40 C

Table 97
3.7.20.2
Table 98
Freescale Semiconductor
USB_Data[7:0]
USB_Clk
USB_Stp
USB_Nxt
USB_Dir
US30
US31
US32
US33
US34
US35
US36
US37
US38
US39
US40
US41
Name
No.
shows the timing specifications for USB in VP_VM unidirectional mode.
defines the USB parallel interface signals.
USB Parallel Interface Timing
Direction
Tx high overlap
Rx rise/fall time
Rx rise/fall time
Tx rise/fall time
Tx rise/fall time
Tx rise/fall time
Tx low overlap
Out
Disable delay
Tx duty cycle
I/O
Enable delay
In
In
In
Parameter
Table 97. USB Timing Specifications in VP_VM Unidirectional Mode
Rx skew
Rx skew
Interface clock—All interface signals are synchronous to USB_Clk
Bidirectional data bus, driven low by the link during idle—Bus ownership is determined by the
direction
Direction—Control the direction of the data bus
Stop—The link asserts this signal for one clock cycle to stop the data stream currently on the bus
Next—The PHY asserts this signal to throttle the data
i.MX25 Applications Processor for Automotive Products, Rev. 9
Table 98. Signal Definitions for USB Parallel Interface
USB_SE0_VM
USB_TXOE_B
USB_SE0_VM
USB_SE0_VM
USB_SE0_VM
USB_SE0_VM
USB_DAT_VP
USB_DAT_VP
USB_DAT_VP
USB_DAT_VP
USB_VM1
USB_RCV
USB_VP1
USB_VP1
Signal
Direction
Out
Out
Out
Out
Out
Out
Out
Out
In
In
In
In
Signal Description
Min.
49.0
–4.0
–6.0
0.0
—
—
—
—
—
—
—
—
Max.
51.0
10.0
+4.0
+2.0
5.0
5.0
5.0
0.0
8.0
3.0
3.0
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
Reference Signal
USB_TXOE_B
USB_TXOE_B
USB_SE0_VM
USB_DAT_VP
USB_DAT_VP
USB_DAT_VP
Conditions/
50 pF
50 pF
50 pF
35 pF
35 pF
—
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