BM5455 – Lenovo Yoga 300-11IBY
The Lenovo Yoga 300-11IBY is built on the BM5455 board designed by Bitland. 3 files are indexed for this board: 3 BIOS files and 3 EC firmware images.
Revisions seen in file names: 1.3. BIOS images are 8 MB. First posted in June 2022 in BIOS Archive and BIOS Skema Boardview Laptop.
BIOS dumps 3
Board facts
| Board number | BM5455 |
|---|---|
| Designed by | Bitland |
| Revisions | 1.3 |
| BIOS chip size | 8 MB |
| First seen | 2022-06-14 |
| Source channels | BIOS Archive, BIOS Skema Boardview Laptop |
| About the number | Bitland boards for Lenovo IdeaPad models are named BM followed by four digits. |
Laptops that use BM5455
- Lenovo Yoga 300-11IBY
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the BM5455 board?
BM5455 is a Bitland board number used by Lenovo.
What BIOS chip size does BM5455 use?
The BIOS images for BM5455 are 8 MB.
Which laptops use the BM5455 board?
Files in the catalog link BM5455 to the Lenovo Yoga 300-11IBY.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.