MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 383

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

MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
NOTE:
Serial Communications Interface Modules (SCI1 and SCI2)
To verify the start bit and to detect noise, data recovery logic takes
samples at RT3, RT5, and RT7.
If start bit verification is not successful, the RT clock is reset and a new
search for a start bit begins.
To determine the value of a data bit and to detect noise, recovery logic
takes samples at RT8, RT9, and RT10.
The RT8, RT9, and RT10 data samples do not affect start bit verification.
If any or all of the RT8, RT9, and RT10 samples are logic 1s following a
successful start bit verification, the NF flag is set and the receiver
interprets the bit as a start bit (logic 0).
RT8, RT9, and RT10 Samples
Freescale Semiconductor, Inc.
RT3, RT5, and RT7 Samples
For More Information On This Product,
Go to: www.freescale.com
000
001
010
011
100
101
110
111
000
001
010
100
101
011
110
111
Table 17-6. Start Bit Verification
Table 17-7. Data Bit Recovery
Serial Communications Interface Modules (SCI1 and SCI2)
Data Bit Determination
Start Bit Verification
0
0
0
1
0
1
1
1
Yes
Yes
Yes
Yes
No
No
No
No
Advance Information
Noise Flag
Noise Flag
0
1
1
1
1
1
1
0
Receiver
0
1
1
0
1
0
0
0
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