MPC5125YVN400 Freescale Semiconductor, MPC5125YVN400 Datasheet - Page 921

• 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

Activation of the list is simple. System software writes the physical memory address of a queue head into
the USB_ASYNCLISTADDR register, then enables the list by setting the asynchronous schedule enable
bit in the USB_USBCMD register to a one.
When inserting a queue head into an active list, software must ensure the schedule is always coherent from
the host controllers' point of view. This means the system software must ensure all queue head pointer
fields are valid. For example, qTD pointers have T-Bits set or reference valid qTDs and the horizontal
pointer references a valid queue head data structure. The following algorithm represents the functional
requirements:
32.6.7.2
This is a software requirement section. There are two independent events for removing queue heads from
the asynchronous schedule. The first is shutting down (deactivating) the asynchronous list. The second is
extracting a single queue head from an activated list. Software deactivates the asynchronous schedule by
setting the asynchronous schedule enable bit in the USB_USBCMD register to 0. Software can determine
when the list is idle when the asynchronous schedule status bit in the USB_USBSTS register is cleared.
The normal mode of operation is that software removes queue heads from the asynchronous schedule
without shutting it down. Software must not remove an active queue head from the schedule. Software
should first deactivate all active qTDs, wait for the queue head to go inactive, then remove the queue head
from the asynchronous list. Software removes a queue head from the asynchronous list using the following
algorithm. Software merely must ensure all of the link pointers reachable by the host controller are kept
consistent.
Freescale Semiconductor
InsertQueueHead (pQHeadCurrent, pQueueHeadNew)
End InsertQueueHead
UnlinkQueueHead (pQHeadPrevious, pQueueHeadToUnlink, pQHeadNext)
--
-- Requirement: all inputs must be properly initialized.
--
-- pQHeadCurrent is a pointer to a queue head that is
-- already in the active list
-- pQHeadNew is a pointer to the queue head to be added
--
-- This algorithm links a new queue head into an existing
-- list
--
pQueueHeadNew.HorizontalPointer = pQueueHeadCurrent.HorizontalPointer
pQueueHeadCurrent.HorizontalPointer = physicalAddressOf(pQueueHeadNew)
--
-- Requirement: all inputs must be properly initialized.
--
-- pQHeadPrevious is a pointer to a queue head that
-- references the queue head to remove
-- pQHeadToUnlink is a pointer to the queue head to be
-- removed
-- pQheadNext is a pointer to a queue head in the
-- schedule. Software provides this pointer with the
-- following strict rules:
-- if the host software is one queue head, then
-- pQHeadNext must be the same as
-- QueueheadToUnlink.HorizontalPointer. If the host
Removing Queue Heads from Asynchronous Schedule
MPC5125 Microcontroller Reference Manual, Rev. 2
Universal Serial Bus Interface with On-The-Go
32-93