ASM1182/ASM1184/ASM1187 chip notes
These are cool cheapish PCIe switches, 1 to 2/4/7 links accordingly. They’re used in many places, from mining equipment to desktop motherboards. I describe them a bit in a Hackaday article. There is not much documentation on them - I wanna aggregate whatever is available, on a single page.
They all seem to need a 1.2V source. No idea how much current tho.
KiCad package for the ASM1184 is Package_DFN_QFN:QFN-64-1EP_9x9mm_P0.5mm_EP5.2x5.2mm.
None of them have datasheets that I’ve seen - things like the I2C registers remain a mystery. Got one? Please let me know!
Info about ASM1182:
- This laptop schematic PDF. It also has some info on strap pins!
Info about ASM1184:
- This schematic PDF
- This blog post - the associated GitHub repo also has KiCad files!!
- Also, from the aforementioned blog post - apparently, there’s an EasyEDA symbol for this chip?
Info about ASM1187:
All of them, you can find on Aliexpress.
What we could use:
- Datasheets
- I2C register maps
Got more info? Contact me through one of the ways you can find.
Pic credit to [AMD Outside].