mc9s12c32mpb16 Freescale Semiconductor, Inc, mc9s12c32mpb16 Datasheet - Page 404

• Manufacturer Part Number: mc9s12c32mpb16
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 13 Serial Communications Interface (S12SCIV2) Block Description
In
at RT5 is high. The RT5 sample sets the noise flag. Although this is a worst-case misalignment of perceived
bit time, the data samples RT8, RT9, and RT10 are within the bit time and data recovery is successful.
Figure 13-17
synchronization with the start bit time, it does set the noise flag.
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Figure
RT CLOCK COUNT
RT CLOCK COUNT
RESET RT CLOCK
RESET RT CLOCK
Rx Input Signal
Rx input Signal
RT CLOCK
RT CLOCK
SAMPLES
SAMPLES
13-16, a large burst of noise is perceived as the beginning of a start bit, although the test sample
shows the effect of noise early in the start bit time. Although this noise does not affect proper
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Figure 13-16. Start Bit Search Example 3
Figure 13-17. Start Bit Search Example 4
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MC9S12C-Family / MC9S12GC-Family
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PERCEIVED START BIT
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Rev 01.23
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PERCEIVED AND ACTUAL START BIT
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ACTUAL START BIT
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LSB
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