Details Of The Update Button - Renesas M16C FAMILY User Manual

(3) Erasing Options is useful when you select "Erase -> Program -> Verify" for
Choose An Options, allowing you to select the method for erasing flash memory
blocks.
(a) Erase All Blocks
All flash blocks are erased
(b) Erase Only Needed Block
Only the corresponding flash block is erased.

4.1.4 Details of the Update Button

Use the "Update" button when you want to upgrade the version of FoUSB.
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4 Using the FoUSB