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Text excerpt from page 26 (click to view)
Pin No.
78
Pin Name
FSEQ
I/O
O
Description
Synchronization signal detection output pin. Outputs a high level when the synchronization signal detected from the EFM signal and the internally generated synchronization signal agree. (Not used)
79 80
DEFECT EFMO
I/O O
Defect pin. Which becomes an input pin after reset and can be controlled externally. This becomes the defect monitor pin under control by command. (Not used) EFM signal output pin. (Not used)