mc68hc908qz16 Freescale Semiconductor, Inc, mc68hc908qz16 Datasheet - Page 191
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mc68hc908qz16
Manufacturer Part Number
mc68hc908qz16
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908QZ16.pdf
(314 pages)
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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.
To verify a stop bit and to detect noise, recovery logic takes samples at RT8, RT9, and RT10.
summarizes the results of the stop bit samples.
Freescale Semiconductor
Table 15-3
The RT8, RT9, and RT10 samples do not affect start bit verification. If any
or all of the RT8, RT9, and RT10 start bit samples are logic 1s following a
successful start bit verification, the noise flag (NF) is set and the receiver
assumes that the bit is a start bit.
summarizes the results of the data bit samples.
RT8, RT9, and RT10 Samples
RT3, RT5, and RT7 Samples
RT8, RT9, and RT10 Samples
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
Table 15-2. Start Bit Verification (Continued)
011
100
101
110
111
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
Table 15-4. Stop Bit Recovery
Table 15-3. Data Bit Recovery
NOTE
Data Bit Determination
Start Bit Verification
Framing Error Flag
Yes
No
No
No
No
0
0
0
1
0
1
1
1
1
1
1
0
1
0
0
0
Noise Flag
Noise Flag
Noise Flag
0
1
1
1
1
1
1
0
0
1
0
0
0
0
1
1
1
1
1
1
0
Functional Description
Table 15-4
191
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