AT90PWM2/3/2B/3B
Figure 19-4. Manchester Decoder operation
Data Clock
Bit 3
Bit 2
Start Bit
Bit 1
Delayed edge
Manchester
Data
N4
N3
N1
N2
N4/4
N1/2
N2/4
N2/2
N3/4
N3/2
Manchester
Decoder
Counter
Detection
Window
Internal
Manchester
Clock
Decoded
Data
Start Bit
Note:
N1 = MBURR[H:L]/2
19.3.4.1
Manchester Framing error detection
When configured in Manchester mode, the framing error (FE) of the USCRA register is not used,
the EUSART generates a dedicated Frame Error Manchester (FEM) when a data data bit is not
detected during the detection window (See Figure 19-5).
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