MCF5253VM140J Freescale Semiconductor, MCF5253VM140J Datasheet - Page 564

• 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
24.9.12.2.8 Managing the QH[FrameTag] Field
The QH[FrameTag] field in a queue head is completely managed by the host controller. The rules for
setting QH[FrameTag] are simple:
24-102
Condition
not(D)
not(C)
not(B)
not(D)
not(A)
•
•
•
A
A
C
A
B
C
D
Rule 1: If transitioning from Do Start Split to Do Complete Split and the current value of
FRINDEX[2:0] is 6, QH[FrameTag] is set to FRINDEX[7:3] + 1. This accommodates split
transactions whose start-split and complete-splits are in different H-Frames (case 2a, see
Figure
Rule 2: If the current value of FRINDEX[2:0] is 7, QH[FrameTag] is set to FRINDEX[7:3] + 1.
This accommodates staying in Do Complete Split for cases 2a, 2b, and 2c in
Rule 3: If transitioning from Do_Start Split to Do Complete Split and the current value of
FRINDEX[2:0] is not 6, or currently in Do Complete Split and the current value of
(FRINDEX[2:0]) is not 7, FrameTag is set to FRINDEX[7:3]. This accommodates all other cases
in
Figure
Ignore QHD
If PIDCode = IN
Halt QHDIf PIDCode = OUT
Retry start-split
If PIDCode = IN
Halt QHD
If PIDCode = OUT
Retry start-split
Execute complete-split
If PIDCode = IN
Halt QHDIf PIDCode = OUT
Retry start-split
24-53).
Table 24-67. Interrupt IN/OUT Do Complete Split State Execution Criteria
24-53.
Action
Neither a start nor complete-split is scheduled for the current micro-frame.Host
controller should continue walking the schedule.
Progress bit check failed. These means a complete-split has been missed. There is
the possibility of lost data. If PID Code is an IN, then the Queue head must be
halted.If PID Code is an OUT, then the transfer state is not advanced and the state
exited (for example, start-split is retried). This is a host-induced error and does not
effect Cerr. In either case, set the Missed Micro-frame bit in the status field to a one.
QH.FrameTag test failed. This means that exactly one or more H-Frames have been
skipped. This means complete-splits and have missed. There is the possibility of lost
data. If PID Code is an IN, then the Queue head must be halted.If PID Code is an
OUT, then the transfer state is not advanced and the state exited (for example,
start-split is retried). This is a host-induced error and does not effect Cerr. In either
case, set the Missed Micro-frame bit in the status field to a one.
This is the non-error case where the host controller executes a complete-split
transaction.
This is a degenerate case where the start-split was issued, but all of the
complete-splits were skipped and all possible intervening opportunities to detect the
missed data failed to fire. If PID Code is an IN, then the Queue head must be halted.
If PID Code is an OUT, then the transfer state is not advanced and the state exited
(for example, start-split is retried). This is a host-induced error and does not effect
Cerr. In either case, set the Missed Micro-frame bit in the status field to a one.
Note: When executing in the context of a Recovery Path mode, the host controller
MCF5253 Reference Manual, Rev. 1
is allowed to process the queue head and take the actions indicated above, or
it may wait until the queue head is visited in the normal processing mode.
Regardless, the host controller must not execute a start-split in the context of
a executing in a Recovery Path mode.
Description
Freescale Semiconductor
Figure
24-53.