XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 257

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

MC68HC908AZ60A — Rev 2.0
MOTOROLA
To verify the start bit and to detect noise, data recovery logic takes
samples at RT3, RT5, and RT7.
the start bit verification samples.
If start bit verification is not successful, the RT clock is reset and a new
search for a start bit begins.
RT CLOCK
RT CLOCK
SAMPLES
CLOCK
RESET
STATE
RT3, RT5, and RT7 Samples
RxD
RT
Serial Communications Interface (SCI)
000
001
010
100
101
011
110
111
Figure 18-8. Receiver Data Sampling
Table 18-5. Start Bit Verification
QUALIFICATION
START BIT
VERIFICATION
Table 18-5
START BIT
Start Bit Verification
Serial Communications Interface (SCI)
START BIT
SAMPLING
Yes
Yes
Yes
Yes
DATA
No
No
No
No
summarizes the results of
Functional Description
Technical Data
Noise Flag
0
1
1
0
1
0
0
0
LSB
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