XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 258
XC908AS60ACFU
Manufacturer Part Number
XC908AS60ACFU
Description
MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
Manufacturer
Motorola Semiconductor Products
Datasheet
1.XC908AS60ACFU.pdf
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Serial Communications Interface (SCI)
Technical Data
258
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 (SCI)
000
001
010
011
100
101
110
111
000
001
010
100
101
011
110
111
Table 18-6. Data Bit Recovery
Table 18-7. Stop Bit Recovery
Table 18-7
summarizes the results of the stop bit
Data Bit Determination
Framing Error Flag
Table 18-6
0
0
0
1
0
1
1
1
1
1
1
0
1
0
0
0
MC68HC908AZ60A — Rev 2.0
summarizes the
Noise Flag
Noise Flag
MOTOROLA
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
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