MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 386

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Serial Communications Interface Modules (SCI1 and SCI2)
Advance Information
386
RT CLOCK COUNT
RT CLOCK COUNT
RESET RT CLOCK
RESET RT CLOCK
RT CLOCK
RT CLOCK
SAMPLES
SAMPLES
RXD
RXD
1
1
1
1
1
1
Serial Communications Interface Modules (SCI1 and SCI2)
Figure 17-20
Although this noise does not affect proper synchronization with the start
bit time, it does set the noise flag.
Figure 17-21
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.
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1
Figure 17-20. Start Bit Search Example 4
Figure 17-21. Start Bit Search Example 5
Freescale Semiconductor, Inc.
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1
For More Information On This Product,
1
1
1
1
Go to: www.freescale.com
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1
shows the effect of noise early in the start bit time.
shows a burst of noise near the beginning of the start bit
1
1
0
0
1
0
PERCEIVED AND ACTUAL START BIT
0
1
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
START BIT
1
0
NO START BIT FOUND
0
0
0
0
0
0
0
MOTOROLA
LSB
LSB