BM5488 – Lenovo Yoga 300-11IBR
The Lenovo Yoga 300-11IBR is built on the BM5488 board designed by Bitland. The catalog lists 5 files for it: 4 BIOS files, 1 schematic and 1 EC firmware image.
Revisions seen in file names: 1.4. First posted in October 2018 in BIOS Archive, Schematics & Boardviews Archive and BIOS Files.
BIOS dumps 4
Schematics 1
From the uploader
Lenovo Yoga 300-11ibr BM5488_FPC_V1.4 Bios+EC
Generated from Original Bios Update File and Tested OK
Board facts
| Board number | BM5488 |
|---|---|
| Designed by | Bitland |
| Revisions | 1.4 |
| First seen | 2018-10-14 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, BIOS Files |
| About the number | Bitland boards for Lenovo IdeaPad models are named BM followed by four digits. |
Laptops that use BM5488
- Lenovo Yoga 300-11IBR
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.
A schematic is the circuit diagram of the main board: power rails, power-up sequence, component values and net names. It is the reference for measuring voltages and tracing a fault.
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 |
|---|---|---|
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Which laptops use the BM5488 board?
Files in the catalog link BM5488 to the Lenovo Yoga 300-11IBR.
Is there a boardview for BM5488?
No boardview has been indexed for BM5488 yet; the schematic is available on this page.
Who designed the BM5488 board?
BM5488 is a Bitland board number used by Lenovo.
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.