MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 374

• Manufacturer Part Number: MC56F8257MLH
• Description: DSC 64K FLASH 60MHZ 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8257MLH

• Core Processor: 56800E
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Product: DSCs
• Processor Series: 56800E
• Core: 56800E
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 54
• Data Ram Size: 8 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Functional Description
The following figure shows a burst of noise near the beginning of the start bit that resets
the RT clock. The sample after the reset is low but is not preceded by three high samples
that would qualify as a falling edge. Depending on the timing of the start bit search and
on the data, the frame may be missed entirely or it may set the framing error flag.
In the following figure, a noise burst makes the majority of data samples RT8, RT9, and
RT10 high. This sets the noise flag but does not reset the RT clock. In start bits only, the
RT8, RT9, and RT10 data samples are ignored.
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MC56F825x/4x Reference Manual, Rev. 2, 10/2010
Figure 11-24. Start Bit Search Example 4
Figure 11-25. Start Bit Search Example 5
Preliminary
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