mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 265

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
To verify the start bit and to detect noise, data recovery logic takes
samples at RT3, RT5, and RT7.
the start bit verification samples.
Start bit verification is not successful if any two of the three verification
samples are logic 1s. 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.
results of the data bit samples.
Serial Communications Interface (SCI)
RT8, RT9, and RT10
RT3, RT5, and RT7
Samples
Samples
000
001
010
011
100
101
110
111
Table 16-2. Start Bit Verification
000
001
010
011
100
101
110
111
Table 16-3. Data Bit Recovery
Table 16-2
Determination
Verification
Start Bit
Data Bit
Yes
Yes
Yes
Yes
No
No
No
No
Serial Communications Interface (SCI)
Table 16-3
0
0
0
1
0
1
1
1
summarizes the results of
Noise Flag
Noise Flag
summarizes the
Functional Description
0
1
1
0
1
0
0
0
0
1
1
1
1
1
1
0
Data Sheet
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