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Is it possible to flash a code into a flash IC without earsing the previously flashed code in it?

Category: Software
Product Number: Blackfin 609
Software Version: CCES 2.11

Hi

I wish to know if it is possible to flash a code into flash IC(N25Q) by not earsing the previously flashed code, so that, both the codes get booted into the main memory of the processor upon power up.

For example,

Consider the code that is previously flashed to be "Toggling of LED1". Now I wish to flash a code (into the same flash IC)  which is to "Toggle LED2"  without erasing the previously flashed "LED1 Toggle code".

By this both the LEDs need to get toggled upon power up.

Can anyone help me with this?

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