MCF5253CVM140 Freescale Semiconductor, MCF5253CVM140 Datasheet - Page 557

• Manufacturer Part Number: MCF5253CVM140
• Description: IC MPU 32BIT 140MHZ 225-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF525xr

Specifications of MCF5253CVM140

• 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
• Family Name: MCF5xxx
• Device Core: ColdFire V2
• Device Core Size: 32b
• Frequency (max): 140MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.2/3.3V
• Operating Supply Voltage (max): 1.32/3.6V
• Operating Supply Voltage (min): 1.08/3V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 225
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Compliant

An example traversal of a periodic schedule that includes FSTNs is illustrated in
In frame N (micro-frames 0-7), for this example, the host controller traverses all of the schedule data
structures utilizing the Normal Path Link Pointers in any FSTNs it encounters. This is because the host
controller has not yet encountered a Save-Place FSTN so it is not executing in Recovery Path mode. When
it encounters the Restore FSTN, (Restore-N), during micro-frames 0 and 1, it uses Restore-N. Normal Path
Link Pointer to traverse to the next data structure (that is, normal schedule traversal). This is because the
host controller must use a Restore FSTN's Normal Path Link Pointer when not executing in a
Recovery-Path mode. The nodes traversed during frame N include: {8
1
In frame N+1 (micro-frames 0 and 1), when the host controller encounters Save-Path FSTN (Save-N), it
observes that Save-N.Back Path Link Pointer.T-bit is zero (definition of a Save-Path indicator). The host
controller saves the value of Save-N. Normal Path Link Pointer and follows Save-N.Back Path Link
Freescale Semiconductor
0
...}.
•
Micro-Frames 0, 1
Normal Traversal
Normal Traversal
IN or an OUT). Refer to the EHCI Specification for a complete list of additional conditions that
must be met in general for the host controller to issue a bus transaction. Note that the host controller
must not execute a Start-split transaction while executing in Recovery Path mode. Refer to the
EHCI Specification for special handling when in Recovery Path mode.
Stop traversing the recovery path when it encounters an FSTN that is a Restore indicator. The host
controller unconditionally uses the saved value of the Save-Place FSTN's Normal Path Link
Pointer when returning to the normal path traversal. The host controller must clear the context of
executing a Recovery Path when it restores schedule traversal to the Save-Place FSTN's Normal
Path Link Pointer.
If the host controller determines that there is not enough time left in the micro-frame to complete
processing of the periodic schedule, it abandons traversal of the recovery path, and clears the
context of executing a recovery path. The result is that at the start of the next consecutive
micro-frame, the host controller starts traversal at the frame list.
for Frame N+1
for Frame N
Figure 24-55. Example Host Controller Traversal of Recovery Path via FSTNs
Frame Numbers
N+5
N+4
N+3
N+1
N–1
N–2
N
8
8
8
8
8
8
8
8
3.0
2.0
7
6
5
4
1
0
8
8
3.1
2.1
MCF5253 Reference Manual, Rev. 1
Save = N
8
8
3.2
2.2
T-Int = 0
8
2.3
N-Ptr
B-Ptr
4
4
4
4
3
2
1
0
2.0
, 8
Causes ‘Restore’
2.1
to Normal Path
, 8
2
2
2.2
Traversal
1
0
, 8
Figure
Universal Serial Bus Interface
N-Ptr
B-Ptr
Restore = N
2.3
Recovery Path
Traversal
, 4
2
24-55.
T-Int = 1
, 2
0
1
, Restore-N,
0
• • •
24-95