Technical Information on On-board Flash Programmer FP-40 Aug. 31, 2023 (Second edition)
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Using each signal in combination
By setting EX_OK signal to "result output" and enabling the output of the EX_BSY and EX_NG signals, the three signals
can be combined to determine the progress and result of Write operation with the external device.
This also applies to EX33_OK and EX33_BSY signals of the External input/output function when 3.3V I / F is used.
In External input/output function, EX_NG signal is output using 3.3V I/ F.
The following waveform is output during Write operation and when the operation completes successfully:
The following waveform is output during Write operation and when the Write operation fails:
H level will be the same as the VTref (Pin 1 of the target connector) level. The level will be L if Vtref is cut off.
If VTref signal is interrupted, EX_OK/EX_NG signal will automatically output L. H will not be output even if VTref signal is
restored after this during the current operation.
In External input/output function using 3.3V I/F, H level will be at 3.3V.
FP-40 monitors if External input/output function is powered by VTref (Pin 1) and if VTref signal is interrupted.
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