MCF5253CVM140J Freescale Semiconductor, MCF5253CVM140J Datasheet - Page 598

• Manufacturer Part Number: MCF5253CVM140J
• Description: IC MCU 2.1MIPS 140MHZ 225MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF525xr

Specifications of MCF5253CVM140J

• 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: -40°C ~ 85°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
RX-dTD is complete when:
On the successful completion of the packet(s) described by the dTD, the active bit in the dTD will be
cleared and the next pointer will be followed when the Terminate bit is clear. When the Terminate bit is
set, the USB_DR will flush the endpoint/direction and cease operations for that endpoint/direction.
On the unsuccessful completion of a packet (see long packet above), the dQH will be left pointing to the
dTD that was in error. In order to recover from this error condition, the DCD must properly re-initialize
the dQH by clearing the active bit and update the nextTD pointer before attempting to re-prime the
endpoint.
There is no required interaction with the DCD for handling such errors.
24.11.3.4.1 Interrupt/Bulk Endpoint Bus Response Matrix
24-136
•
•
•
•
All packets described dTD were successfully transmitted. *** Total bytes in dTD will equal zero
when this occurs.
All packets described in dTD were successfully received. *** Total bytes in dTD will equal zero
when this occurs.
A short packet (number of bytes < maximum packet length) was received. *** This is a successful
transfer completion; DCD must check Total Bytes in dTD to determine the number of bytes that
are remaining. From the total bytes remaining in the dTD, the DCD can compute the actual bytes
received.
A long packet was received (number of bytes > maximum packet size) OR (total bytes received >
total bytes specified). *** This is an error condition. The device controller will discard the
remaining packet, and set the Buffer Error bit in the dTD. In addition, the endpoint will be flushed
and the USBERR interrupt will become active.
All packet level errors such as a missing handshake or CRC error will be
retried automatically by the device controller.
1
2
SYSERR—System error should never occur when the latency FIFOs are correctly sized
Invalid
Setup
Ping
Out
Force Bit Stuff Error.
NYET/ACK— NYET unless the Transfer Descriptor has packets remaining according to
the USB variable length protocol then ACK.
and the DCD is responsive.
In
Table 24-85. Interrupt/Bulk Endpoint Bus Response Matrix
Ignore
STALL
STALL
STALL
Ignore
Stall
Not Primed
MCF5253 Reference Manual, Rev. 1
Ignore
Ignore
NAK
NAK
NAK
Receive + NYET/ACK
NOTE
Transmit
Primed
Ignore
Ignore
ACK
2
Underflow
BS Error
Ignore
N/A
N/A
N/A
1
Overflow
Ignore
NAK
N/A
N/A
N/A
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