MPC5125YVN400 Freescale Semiconductor, MPC5125YVN400 Datasheet - Page 918

• Manufacturer Part Number: MPC5125YVN400
• Description: IC MCU 32BIT E300 324TEPBGA
• Manufacturer: Freescale Semiconductor
• Series: MPC51xxr

Specifications of MPC5125YVN400

• Core Processor: e300
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, USB OTG
• Peripherals: DMA, WDT
• Number Of I /o: 64
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.33 V ~ 1.47 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 324-PBGA
• Processor Series: MPC51xx
• Core: e300
• Data Bus Width: 32 bit
• Development Tools By Supplier: TWR-MPC5125-KIT, TWR-SER, TWR-ELEV, TOWER
• Maximum Clock Frequency: 400 MHz
• Operating Supply Voltage: 1.4 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Data Ram Size: 32 KB
• I/o Voltage: 3.3 V
• Interface Type: CAN, I2C
• Minimum Operating Temperature: - 40 C
• Program Memory Size: 32 bit
• Cpu Speed: 400MHz
• Embedded Interface Type: CAN, I2C, SPI, UART, USB
• Digital Ic Case Style: TEPBGA
• No. Of Pins: 324
• Rohs Compliant: Yes
• Cpu Family: MPC5xx
• Device Core Size: 32b
• Frequency (max): 400MHz
• Total Internal Ram Size: 32KB
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 324
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Universal Serial Bus Interface with On-The-Go
As noted earlier, the client request includes a pointer to the base of the buffer and offsets into the buffer to
annotate which buffer sections are used on each bus transaction that occurs on this endpoint. System
software must initialize each transaction description in an iTD to ensure it uses the correct portion of the
client buffer. For example, for each transaction description, the PG field is set to index the correct physical
buffer page pointer and the transaction offset field is set relative to the correct buffer pointer page (for
example, the same one referenced by the PG field). When the host controller executes a transaction, it
selects a transaction description record based on USB_FRINDEX[2:0]. It then uses the current page buffer
pointer (as selected by the PG field) and concatenates to the transaction offset field. The result is a starting
buffer address for the transaction. As the host controller moves data for the transaction, it must watch for
a page wrap condition and properly advance to the next available page buffer pointer. System software
must not use the Page 6 buffer pointer in a transaction description where the length of the transfer wraps
a page boundary. Doing so yields undefined behavior. The host controller hardware is not required to alias
the page selector to page zero. USB 2.0 isochronous endpoints can specify a period greater than one.
Software can achieve the appropriate scheduling by linking iTDs into the appropriate frames (relative to
the frame list) and by setting appropriate transaction description elements active bits to a one.
32.6.6.2.1
The isochronous scheduling threshold field in the USB_HCCPARAMS register is an indicator to system
software as to how the host controller pre-fetches and effectively caches schedule data structures. System
software uses it when adding isochronous work items to the periodic schedule. The value of this field
indicates to system software the minimum distance it can update isochronous data (relative to the current
location of the host controller execution in the periodic list) and continue to have the host controller
process them.
32-90
Frame List
Frame i+1
Frame i+2
Frame i+n
Frame i
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Periodic Scheduling Threshold
Figure 32-56. Example Association of iTDs to Client Request Buffer
MPC5125 Microcontroller Reference Manual, Rev. 2
iTD
iTD
iTD
N
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1
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Client Buffer
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Freescale Semiconductor
Transaction
Information
Request
Client
USB