mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 296

• Manufacturer Part Number: mc68hc708mp16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface Module (SCI)
Technical Data
296
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.
RT8, RT9, and RT10 Samples
RT8, RT9, and RT10 Samples
Serial Communications Interface Module (SCI)
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
Table 14-3. Stop Bit Recovery
Table 14-2. Data Bit Recovery
Table 14-3
summarizes the results of the stop bit
Data Bit Determination
Framing Error Flag
Table 14-2
0
0
0
1
0
1
1
1
1
1
1
0
1
0
0
0
MC68HC708MP16
Freescale Semiconductor
summarizes the
Noise Flag
Noise Flag
—
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
Rev. 3.1