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This usually means the COM port is already in use by another program or you selected the wrong port number.

If you have acquired a Sunplus Loader pack, follow this standard safety protocol:

: Consolidates separate loader tools for different chips into a single executable.

Option 1: The "Pro" Technical Look (Best for Forums/Telegram)

: Allows users to select specific DDR types (DDR2/DDR3) to match their hardware for a successful flash. How to Use the Loader

Sunplus Loader All In One Best ^new^ Jun 2026

This usually means the COM port is already in use by another program or you selected the wrong port number.

If you have acquired a Sunplus Loader pack, follow this standard safety protocol:

: Consolidates separate loader tools for different chips into a single executable.

Option 1: The "Pro" Technical Look (Best for Forums/Telegram)

: Allows users to select specific DDR types (DDR2/DDR3) to match their hardware for a successful flash. How to Use the Loader