MCIMX255AJM4AR2 Freescale Semiconductor, MCIMX255AJM4AR2 Datasheet - Page 117

• 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

2
3.7.20
This section describes timing for the USB OTG port and host ports. Both serial and parallel interfaces are
described.
3.7.20.1
The USB serial transceiver is configurable to four modes supporting four different serial interfaces:
The following subsections describe the timings for these four modes.
3.7.20.1.1
Table 90
Figure 89
Freescale Semiconductor
F
baud_rate
•
•
•
•
USB_TXOE_B
USB_SE0_VM
USB_DAT_VP
Transmit
USB_SE0_VM
USB_DAT_VP
DAT_SE0 bidirectional, 3-wire mode
DAT_SE0 unidirectional, 6-wire mode
VP_VM bidirectional, 4-wire mode
VP_VM unidirectional, 6-wire mode
Name
defines the DAT_SE0 bidirectional mode signals.
: Baud rate frequency. The maximum baud rate the UART can support is ( ipg_perclk frequency)/16.
shows the USB transmit waveform in DAT_SE0 bidirectional mode diagram.
USBOTG Timing
USB Serial Interface Timing
DAT_SE0 Bidirectional Mode Timing
Figure 89. USB Transmit Waveform in DAT_SE0 Bidirectional Mode
Table 90. Signal Definitions—DAT_SE0 Bidirectional Mode
i.MX25 Applications Processor for Automotive Products, Rev. 9
Direction
Out
Out
Out
In
In
US4
Transmit enable, active low
Tx data when USB_TXOE_B is low
Differential Rx data when USB_TXOE_B is high
SE0 drive when USB_TXOE_B is low
SE0 Rx indicator when USB_TXOE_B is high
US1
Signal Description
US2
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