MCF5253VM140J Freescale Semiconductor, MCF5253VM140J Datasheet - Page 604

• Manufacturer Part Number: MCF5253VM140J
• Description: IC MCU 2.1MIPS 140MHZ 225MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF525xr

Specifications of MCF5253VM140J

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 140MHz
• Connectivity: CAN, EBI/EMI, I²C, QSPI, UART/USART, USB OTG
• Peripherals: DMA, WDT
• Program Memory Type: ROMless
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Data Converters: A/D 6x12b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 70°C
• Package / Case: 225-MAPBGA
• Processor Series: MCF525x
• Core: ColdFire V2
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details

Universal Serial Bus Interface
24.11.4.1 Queue Head Initialization
One pair of device queue heads must be initialized for each active endpoint. To initialize a device queue
head:
24-142
•
•
•
•
•
Write the wMaxPacketSize field as required by the USB Chapter 9 or application specific protocol.
Write the multiplier field to 0 for control, bulk, and interrupt endpoints. For ISO endpoints, set the
multiplier to 1,2, or 3 as required bandwidth an in conjunction with the USB Chapter 9 protocol.
Note: In FS mode, the multiplier field can only be 1 for ISO endpoints.
Write the next dTD Terminate bit field to ‘1.’
Write the Active bit in the status field to ‘0.’
Write the Halt bit in the status field to ‘0.’
ENDPOINTLISTADDR
The DCD must only modify dQH if the associated endpoint is not primed
and there are no outstanding dTD's.
Up to
32 elements
Endpoint Queue Heads
Figure 24-64. Endpoint Queue Head Diagram
Endpoint QH 0 – Out
Endpoint QH 0 – In
Endpoint QH 1 – Out
MCF5253 Reference Manual, Rev. 1
NOTE
Transfer Buffer Pointer
Transfer Buffer Pointer
Transfer
Buffer
Pointer
Endpoint
Transfer
Descriptor
Transfer
Buffer
Transfer Buffer
Pointer
Transfer
Buffer
Freescale Semiconductor
Transfer
Buffer
Transfer
Buffer