Implement the USB MSD protocol by handling the BOT protocol commands.
void usb_msd_handle_command(uint8_t* command)
// Handle the command
switch (command[0])
case SCSI_INQUIRY:
// Handle Inquiry command
break;
case SCSI_READ_CAPACITY:
// Handle Read Capacity command
break;
case SCSI_READ:
// Handle Read command
break;
case SCSI_WRITE:
// Handle Write command
break;
default:
// Handle unknown command
break;
When you plug a drive with this controller into a PC, it identifies itself as a USB Mass Storage Device.
The SSS6697 is a popular USB 2.0 flash drive controller commonly found in generic, OEM, and promotional USB drives. It acts as the bridge between the NAND flash memory (the storage chips) and the computer via the USB interface.
Key Features:
When you plug in an SSS6697 B7 drive, Windows should load the USB Mass Storage Device driver. If that doesn’t happen, you might see:
Common causes:
Q: My SSS6697 shows as "Code 10" in Device Manager. Does the MPtool fix this? A: Yes. Code 10 (Device cannot start) means the firmware is corrupted. The MPtool reloads the firmware. sss6697 b7 usb mass storage work
Q: Can I use this on a Mac?
A: No. The MPtool is Windows-only. On Mac, you can try diskutil eraseDisk FAT32 NAME MBRFormat /dev/disk2, but if the controller is bricked, it won't work.
Q: The MPtool says "Bad Block over setting" – what does that mean? A: This means your NAND flash has too many physical dead cells. The controller has run out of spare blocks to remap. The drive is dying. Get a new USB stick; this one is on its final leg.
This controller is commonly found in generic, OEM, and branded USB flash drives (USB 2.0). When users search for this topic, they are typically trying to repair a corrupted drive or understand why it has stopped working. Implement the USB MSD protocol by handling the
Here is a detailed breakdown of how this controller works regarding USB mass storage, common issues, and repair procedures.
The "B7" suffix indicates a specific hardware revision and firmware architecture. Unlike generic controllers (like Alcor or Phison), the SSS6697 series is notoriously picky about the tooling software used to fix it. Using the wrong version of a formatting tool will result in a "Not supported" error or "Device Not Found."
Windows 10 and 11 enforce driver signature verification. Older SSS6697-B7 tools use unsigned drivers. When you try to run the factory software, Windows blocks it, preventing the mass storage driver from loading. When you plug a drive with this controller