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FirstChip chipYC2019 USB2DISK 64GB SanDisk TLC Stuck VID FFFF Recovery with MPTool

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User question

Description: [J:]USB Mass Storage Device(NAND USB2DISK)
Device Type: Mass Storage Device

Protocal Version: USB 2.00
Current Speed: High Speed
Max Current: 100mA

USB Device ID: VID = FFFF PID = 1201

Device Revision: 0000

Manufacturer: NAND
Product Model: USB2DISK
Product Revision: 0.00

Controller Vendor: FirstChip
Controller Part-Number: chipYC2019
Flash ID code: 453E98B3766B - SanDisk - 1CE/Single Channel [TLC] -> Total Capacity = 64GB

Tools on web: http://dl.mydigit.net/search/?type=all&q=chipYC2019


Possible Flash Part-Number
----------------------------
Unknown


Flash ID mapping table
----------------------------
[Channel 0] [Channel 1]
453E98B3766B --------
-------- --------
-------- --------
-------- --------
-------- --------
-------- --------
-------- --------
-------- --------

Artificial Intelligence Response

Direct answer to the question

  • Your USB flash drive is in factory/boot-recovery mode (VID = FFFF, PID = 1201) because the firmware inside the FirstChip chipYC2019 controller is missing or corrupt.
  • To restore normal operation you must re-program the controller with a FirstChip Mass-Production Tool (MPTool) that explicitly supports “chipYC2019” and the SanDisk TLC NAND having Flash-ID 453E98B3766B (64 GB, 1-CE).
  • The most up-to-date public package is distributed on USBDev.ru and MyDigit.net. As of Q2-2024 the newest working release is FC1179/YC2019 MPTool v1.0.7.2 (2024-02-21).
  • The re-flash process is destructive; all user data will be lost. If data matters, consult a professional NAND off-chip recovery service first.

Detailed problem analysis

  1. Why the drive shows VID FFFF / PID 1201
    • In FirstChip controllers any unrecoverable firmware error forces the boot ROM to enumerate with 0xFFFF:0x1201.
    • The controller waits for a PC-side MPTool to download a new firmware image into RAM/flash and rebuild the Flash Translation Layer (FTL).

  2. Hardware details inferred from the diagnostic dump
    • Controller family: FirstChip FC1179 derivative branded “chipYC2019”.
    • NAND: SanDisk 64-Gibit TLC die, single channel (1 CE).
    • Bus: USB 2.0 High-Speed, max 100 mA declared.
    • No flash-parameter record present → controller cannot initialise NAND on its own.

  3. Restoration theory
    • MPTool contains a database (ini/xml/bin) of timing tables, ECC strategy, bad-block marker position, etc. for every supported Flash-ID.
    • During “Low-Level Format” the tool:
    – uploads temporary loader → enumerates chip,
    – verifies Flash-ID and density,
    – writes firmware, builds bad-block map,
    – creates new logical capacity and (optionally) partitions.
    • A mismatch between Flash-ID and table = error 0x8801 / 0x8xxx in MPTool.

Current information and trends

• February 2024 build 1.0.7.2 adds the SanDisk B376 TLC family used in many 64 GB sticks.
• Ongoing community work on MyDigit.net and USBDev.ru keeps private databases up-to-date because FirstChip no longer publishes English documentation.
• Counterfeit drives: many low-cost sticks use identical controllers but down-binned NAND. After proper MPTool re-flash the real capacity (sometimes 8 GB or 16 GB) becomes visible—be prepared.

Supporting explanations and details

Typical MPTool workflow (translated from Chinese UI):

  1. Run FC_MpTool.exe → admin rights.
  2. Insert ONLY the faulty drive into a USB 2.0 root port.
  3. Slot shows red, ID FFFF:1201.
  4. Press “Setting” → password 320, 123456, or blank.
  5. Tabs of interest:
    • Flash ‑ Auto or manual set Flash-ID 453E98B3766B, Capacity 64 GB.
    • Format ‑ choose “Full Scan” (low-level).
    • Vendor ‑ enter preferred VID/PID (e.g. 0781/5581 for SanDisk, or leave default 0951/1666).
  6. Save → Start. A 64 GB TLC full-scan may take 20–45 min.
  7. On success slot turns green, drive re-enumerates with new VID/PID and correct size.

If the tool never detects the Flash-ID:
• Try v1.0.6.x or the “SM” (single-mask) branch; some builds have broader tables.
• Look for Database\*.ini where you can manually add line
453E98B3766B, 64G, TLC, 1CE, BCH64, … (parameters borrowed from similar SanDisk 64 G chips).

Ethical and legal aspects

  • Re-flashing voids any OEM warranty.
  • Distributing vendor firmware may violate NDAs; obtain tools only from sites that have redistribution permission or user-uploaded archives.
  • MPTools wipe all user data permanently—obtain explicit consent if you service hardware that is not yours.

Practical guidelines

Best practice checklist
✓ Use a desktop rear USB2.0 port (stable 5 V, no hub).
✓ Disable Windows power-saving on USB and close backup software.
✓ Keep a notebook of original parameters before modifying the ini.
✓ After repair run H2testw or f3probe to verify true capacity.
Potential challenges
• Chinese UI – use Google Lens or pre-translated screenshots.
• Write-protect error 0x8875 – clear “WP” jumper pad on PCB if present.
• Excessive bad blocks – NAND worn out; MPTool will downsize capacity or abort.

Possible disclaimers or additional notes

  • There is no public schematic for chipYC2019; pinout guesses are based on FC1179.
  • Some counterfeit drives fake SanDisk Flash-ID; re-flash may expose genuine capacity smaller than 64 GB.
  • If MPTool reports NAND not found even with correct table, controller itself may be ESD-damaged → uneconomical to repair.

Suggestions for further research

• Monitor USBDev.ru thread “FirstChip FC1179/FC1308 — MPTools & Flash-ID list” for new database releases.
• Explore open-source NAND tools (Flashrom, open-mpall) being ported to FirstChip—could allow Linux reprogramming.
• Investigate implementing custom VID/PID and UASP mode on newer FirstChip USB 3.1 variants (FC831, FC840).

Brief summary

Your flash drive is stuck in boot mode because its FirstChip chipYC2019 firmware is lost. Obtain the latest FirstChip MPTool v1.0.7.2 (or newer) that recognises Flash-ID 453E98B3766B, run a low-level “production” format, and the controller will rebuild its translation layer. The procedure is inherently data-destructive and may reveal a smaller genuine capacity if the stick is counterfeit. Always verify success with H2testw/f3 and keep backups of critical data in the future.

User question

chipYC2019

Artificial Intelligence Response

Direct answer to the question

  • “chipYC2019” is a FirstChip USB‑flash controller (same MP‑tooling family as FC1179). When such drives enumerate as VID FFFF / PID 1201 with generic strings like “NAND USB2DISK,” the controller is in boot/ROM (factory) mode due to missing/corrupted firmware. The standard remedy is to reprogram the controller with a compatible FirstChip Mass‑Production Tool (MPTool) and rebuild the Flash Translation Layer (FTL). (usbdev.ru)
  • The newest widely circulated MPTool build I can confirm for FC1179/YC2019 is v1.0.7.2 dated 2024‑02‑21; community threads in 2025 still reference this family and workflow. Obtain from reputable archives (e.g., usbdev.ru, mydigit) and match your exact NAND Flash ID. (usbdev.ru)

Detailed problem analysis

  • What VID FFFF / PID 1201 means:
    • FirstChip controllers boot from an internal ROM. If they cannot load valid firmware from reserved NAND pages, they fall back to a minimal USB device with generic descriptors and enumerate as FFFF:1201. The device will show “No Media” or 0 B because no LUN is exported before the FTL is rebuilt. (elektroda.com)
  • Why this happens:
    • Abrupt power loss, counterfeit/over‑reported capacity, or NAND wear can corrupt firmware and bad‑block tables. Many chipYC2019 cases on community forums involve fake‑capacity sticks that collapse to their real size after a proper low‑level rebuild. (elektroda.com)
  • Controller family and tooling:
    • chipYC2019 boards are handled by FirstChip’s FC1179 MPTool lineage; successful recovery requires a build that explicitly supports your controller revision and your NAND Flash ID (e.g., SanDisk IDs like 453E 98 B3 76 6B for nominal 64 GB 1‑CE TLC). (usbdev.ru)
  • What the MPTool actually does:
    • Downloads a loader, identifies NAND (by JEDEC ID), performs erase/scan, creates/repairs bad‑block tables, writes a new controller firmware image with your chosen VID/PID and product strings, then builds the FTL and formats. OS‑level tools cannot substitute for this step. (elektroda.com)

Current information and trends

  • Publicly verifiable toolset:
    • FC1179/YC2019 MPTool v1.0.7.2 (2024‑02‑21) remains the latest package I can confirm from reputable archives as of today (November 19, 2025). Community threads in 2025 still guide users to FC1179‑series MPTools for YC2019 recoveries. (usbdev.ru)
  • Ongoing community knowledge:
    • 2025 posts continue to document YC2019 cases (Hynix/SanDisk NAND; fake capacities; long full‑scans). Data‑recovery practitioners also publish ECC resources for FC1179, reflecting continued interest in this family. (elektroda.com)

Supporting explanations and details

  • Minimal, reproducible recovery procedure (data‑destructive):
    1. Collect a ChipGenius/USBTreeView report to capture controller tag and NAND Flash ID. (usbdev.ru)
    2. Download a FirstChip MPTool build that lists your controller/NAND pair (FC1179/YC2019 v1.0.7.x is a good starting point). (usbdev.ru)
    3. Use a Windows 7/10/11 PC, run the tool as Administrator on a native rear USB‑2.0 port (avoid hubs). Disable USB selective suspend during the flash. (elektroda.com)
    4. In Settings (password often blank, “320”, or “123456”), let the tool auto‑detect NAND or manually set parameters per your Flash ID. Prefer a full/low‑level scan to rebuild the FTL. (elektroda.com)
    5. Start. A 64 GB TLC full‑scan typically takes tens of minutes; larger/fake‑advertised sticks can take hours. On PASS, re‑enumeration will show a non‑generic VID/PID and real capacity. (elektroda.com)
    6. Validate with H2testw/F3; if errors or size mismatch appear, retire the device. (elektroda.com)
  • If Flash ID is not recognized or the process fails early:
    • Try an adjacent MPTool branch/version; success sometimes depends on the bundled Flash‑DB. Persistent “NAND not found” or “Too many bad blocks” suggests physical failure. (elektroda.com)

Ethical and legal aspects

  • Tools and firmware images are proprietary and circulate informally; use only on hardware you own. Changing VID/PID to impersonate another vendor can violate USB‑IF licensing and may confuse end users. Many problem cases involve counterfeit drives—disclose true capacity if you resell/transfer. (elektroda.com)

Practical guidelines

  • Provide these to tailor exact settings:
    • Full ChipGenius/USBTreeView output, especially Controller Part‑Number and Flash ID.
    • Whether data recovery matters (if yes, do not run MPTool—seek chip‑off service first).
    • Photos of PCB (both sides) if accessible; monolithic “UDP” sticks limit hardware access. (reddit.com)
  • Best practices during flashing:
    • One USB storage device connected; stable power; antivirus temporarily disabled; avoid touching VID/PID unless you need to. Always verify capacity after. (elektroda.com)

Possible disclaimers or additional notes

  • A successful low‑level rebuild permanently destroys prior data mappings; this is not reversible. Some units are irrecoverable due to worn NAND or controller damage. Community‑posted tool bundles may contain malware—use a sacrificial VM if in doubt. (reddit.com)

Suggestions for further research

  • Track FC1179/YC‑series MPTool releases and Flash‑DB updates on archival sites and forums; real‑world case threads often include parameter presets for specific Flash IDs. For deeper understanding, review practitioner notes on ECC/translator behavior in FC1179‑class controllers. (usbdev.ru)

Brief summary

  • chipYC2019 identifies a FirstChip USB‑flash controller commonly seen in low‑cost/counterfeit sticks. If your device shows FFFF:1201 and “USB2DISK,” it is in ROM mode awaiting firmware. Recovery typically requires a matching FirstChip MPTool (FC1179/YC2019 family), a full low‑level scan, and a firmware rebuild—this restores function but erases all data. Share your ChipGenius report and whether data recovery is the priority, and I’ll give you exact, Flash‑ID‑matched parameters. (usbdev.ru)

Would you like me to walk you through the exact MPTool settings for your Flash ID and intended capacity? If so, please paste the ChipGenius (or ChipEasy) output.

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Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.
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