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CC2642R: Mainly difference with CC2640R2F

Part Number: CC2642R
Other Parts Discussed in Thread: CC2640R2F

Dear TI Experts,

I am using CC2640R2F and now find that the Flash and SRAM is not enough, so I'd like to change to CC2642R

My SDK Version is 1_40_00_45, and  using BLE5

I has used the off-chip OAD,SPI,I2C and bluetooth

And I'd like to know if I change to CC2642R from CC2640R2F, ①will the software change a lot?  ②Using  official SDK, when off-chip OAD update,Is the  protocol the same?