mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 265

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

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 8-15
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 (logic 0).
summarizes the results of the data bit samples.
RT8, RT9, and RT10 Samples
RT8, RT9, and RT10 Samples
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
MC9S12E256 Data Sheet, Rev. 1.08
Table 8-16. Stop Bit Recovery
Table 8-15. Data Bit Recovery
NOTE
Data Bit Determination
Framing Error Flag
0
0
0
1
0
1
1
1
1
1
1
0
1
0
0
0
Chapter 8 Serial Communication Interface (SCIV4)
Noise Flag
Noise Flag
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
Table 8-16
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