3 ms·

depends on your motherboard. most gaming motherboards have a TPM2.0 slot on them and that TPM is connected over either LPC or SPI nowadays (some I2C). And of th

depends on your motherboard. most gaming motherboards have a TPM2.0 slot on them and that TPM is connected over either LPC or SPI nowadays (some I2C). And of those, basically everyone is moving to the SPI interface. The exact pin-out of the slot depends on the motherboard but they are all basically minor variations on the pinout of a 13 pin (14 pin with 1 filled) or 20 pin connector. When you buy your motherboard you can find the full pinout in the manual. That gets you your connector to the motherboard. For the actual chip itself and the PCB layout, buy an infineon TPM2.0. They cost a few dollars at most. The docs that you can pull off the site include the pinout and operating condition requirements. From that you can build a simple board to run the chip. Hell most of the docs include the plans for one (albeit you might need to change that to fit your mobo. https://www.infineon.com/cms/en/product/security-smart-card-solutions/optiga-embedded-security-solutions/optiga-tpm/ https://www.infineon.com/cms/en/product/security-smart-card-...

pgeorgi 3y ago
> most gaming motherboards have a TPM2.0 slot on them and that TPM is connected over either LPC or SPI nowadays Mostly these days it's an fTPM, implemented in firmware (ME or AMD's "Security Processor") especially when it comes to TPM2.0 which is an entirely new madness of complexity hell compared to TPM1.
- CuriousCosmic 3y ago
  It shouldn't be? I got a new AM4 board a year or two ago and almost every board on the market at the time had TPM2.0 slots. The issue was that they aren't advertised and barely mentioned but they were there. From taking a quick search, I selected the first AM5 motherboard I saw from ASRock, MSI, Gigabyte, and ASUS. All had TPM headers buried in the specs or only listed in the manual. Caveat that with ASUS it seems the ROG boards don't have TPM headers but the equivalent ASUS non-ROG boards consistently do. Point being that they are still quite common and if that's a feature you care about, it's easy to accommodate in any build without even having to look for a different brand. The only issue is that they aren't well advertised or advertised at all.

pgeorgi 3y ago

> most gaming motherboards have a TPM2.0 slot on them and that TPM is connected over either LPC or SPI nowadays Mostly these days it's an fTPM, implemented in firmware (ME or AMD's "Security Processor") especially when it comes to TPM2.0 which is an entirely new madness of complexity hell compared to TPM1.

CuriousCosmic 3y ago
It shouldn't be? I got a new AM4 board a year or two ago and almost every board on the market at the time had TPM2.0 slots. The issue was that they aren't advertised and barely mentioned but they were there. From taking a quick search, I selected the first AM5 motherboard I saw from ASRock, MSI, Gigabyte, and ASUS. All had TPM headers buried in the specs or only listed in the manual. Caveat that with ASUS it seems the ROG boards don't have TPM headers but the equivalent ASUS non-ROG boards consistently do. Point being that they are still quite common and if that's a feature you care about, it's easy to accommodate in any build without even having to look for a different brand. The only issue is that they aren't well advertised or advertised at all.