mc68hc908ap8cfa Freescale Semiconductor, Inc, mc68hc908ap8cfa Datasheet - Page 192
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mc68hc908ap8cfa
Manufacturer Part Number
mc68hc908ap8cfa
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908AP8CFA.pdf
(324 pages)
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Infrared Serial Communications Interface Module (IRSCI)
If start bit verification is not successful, the RT clock is reset and a new search for a start bit begins.
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.
192
Table 12-3
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.
summarizes the results of the data bit samples.
RT8, RT9, and RT10
RT3, RT5, and RT7
RT8, RT9, and RT10
Samples
MC68HC908AP Family Data Sheet, Rev. 4
Samples
Table 12-2. Start Bit Verification
Samples
000
001
010
011
100
101
110
111
Table 12-4. Stop Bit Recovery
Table 12-3. Data Bit Recovery
011
100
101
110
111
000
001
NOTE
Determination
Verification
Error Flag
Start Bit
Framing
Data Bit
Yes
No
No
No
No
1
1
0
0
0
1
0
1
1
1
Noise Flag
Noise Flag
Noise Flag
0
1
0
1
0
0
0
0
1
1
1
1
1
1
0
Freescale Semiconductor
Table 12-4
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