MCF5253CVM140 Freescale Semiconductor, MCF5253CVM140 Datasheet - Page 320

• 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

Audio Interface Module (AIM)
The timing, as it applies to packet boundary, is extracted by hardware.The last UChannelRcvFull
corresponding to a given packet should be coincident with the last QChannelRcvFull. In this last U, Q
channel interrupt, symbols 95-98 are received, as are Q-channel bits 67-98. The interrupts are coincident
with ChannelSyncFound, flagging the last symbols of the current frame.
When the start of a new packet is found before the current packet is complete (less than 98 symbols in the
packet), the ChannelLengthError interrupt is set. The application software should read out UChannelRcv
and QchannelRcv registers, discard the value, and assume the start of a new packet.
As previously mentioned, packet sync extraction is tolerant for single-symbol errors. Packet sync detection
is based on the recognition of the sequence data-sync-sync-data in the symbol stream, because this is the
only syncing sequence that is not affected by single errors. If the sync symbol is not found 98 symbols after
the previous occurrence, it is assumed to be destroyed by channel error, and a new sync symbol is
interpolated.
Normally, only data bytes are passed to the application software. Every data byte will have its most
significant bit set. If sync symbols are passed to the application software (i.e., the processor), they are seen
as all-zero symbols. Sync symbols can only end up in the data stream due to channel error.
17.6.1.11 Behavior of User Channel Receive Interface (non-CD data)
This section details the behavior of the user channel receive interface on incoming non-CD data.
This mode is selected if UsyncMode (bit 1) in register CD Text control is set ‘0’.
In non-CD mode, the IEC958 User channel stream is recognized as a sequence of data symbols. No packet
recognition is done.
Any sequence found in the IEC958 U-channel stream starting with a leading one, followed by 7
information bits, is recognized as a data symbol. Subsequent data symbols are separated by pauses. During
the pause, zero bits are seen on the IEC958 U-channel.
Four consecutive data symbols seen in the IEC958 U-Channel stream are grouped together into the
UChannelRcv register. First symbol is left, last symbol is right aligned. Whenever UChannelRcv contains
4 new data symbols, UChannelRcvFull is asserted.
In this mode, the operation of QchannelRcv and associated interrupt QChannelRcvFull is reserved,
undefined. Also reserved, undefined is the operation of ChannelLengthError and ChannelSyncFound.
The U-channel is extracted and output by the IEC958 Receive block on EBURcvUChannelStream.
Processing is done by the CD-Subcode as described in
Section 17.7, “Processor Interface Overview.”
17.6.2
IEC958 (SPDIF) Transmit Interface
The IEC958 interface provides the necessary features to allow transmitting of digital data according to the
IEC958 specification with the exception that only 20-bit data is supported. The 4 LSB’s of the 24-bit data
word are always ‘0’. In addition to data, the interface allows for transmission of the C- and U-channels and
control over the Valid flag. Note: For the U-channel, only the CD User Data format is supported.
MCF5253 Reference Manual, Rev. 1
17-22
Freescale Semiconductor