mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 259

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
NOTE:
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.
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.
To verify a stop bit and to detect noise, recovery logic takes samples at
RT8, RT9, and RT10.
samples.
Serial Communications Interface (SCI)
RT8, RT9, and RT10
RT8, RT9, and RT10
Samples
Samples
Table 13-2. Data Bit Recovery
Table 13-3. Stop Bit Recovery
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
Table 13-3
Determination
summarizes the results of the stop bit
Error Flag
Framing
Data Bit
Serial Communications Interface (SCI)
0
0
0
1
0
1
1
1
1
1
1
0
1
0
0
0
Table 13-2
Noise Flag
Noise Flag
summarizes the
Functional Description
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
Technical Data
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