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How can microcontroller recognize the mode in the uPD78F0034A?

Latest Updated:12/01/2011

Question:

In the uPD78F0034A, either 3-wire serial or UART can be used as the data transfer mode for programming.
How can the microcontroller recognize the mode?

Answer:

The mode is specified by the Vpp pulse count at the beginning of the flash programming mode.
For details, refer to section 6. Flash Memory Programming in the data sheet.
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