mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 409
mc9s12hz256v2
Manufacturer Part Number
mc9s12hz256v2
Description
Hcs12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12HZ256V2.pdf
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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 13-15
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).
RT8, RT9, and RT10 Samples
RT8, RT9, and RT10 Samples
summarizes the results of the data bit samples.
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
MC9S12HZ256 Data Sheet, Rev. 2.05
Table 13-16. Stop Bit Recovery
Table 13-15. 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 13 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 13-16
409
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