T2080 - Trust Architecture Usage

[manikumar]

Hi,

To enable trust architecture in T2080, Recommendation is PROG_SFP status to be changed from 1.8 V to GND based on T2080 datasheet (pg 50) Figure 8. PROG_SFP timing diagram.

How to handle this change of state for PROG_SFP from hardware?

Regards,

Mani

[alexander_yakov]

Fuse programming voltage PROG_SFP should be applied for fuse programming purpose only. Fuse programming voltage PROG_SFP must be =GND at power up, and applied only after required minimum delay (see Table 5)

After fuse programming is completed, PROG_SFP is required to return back to GND before system is powered down or PORESET is asserted.

[manikumar]

Hello Alexander,

Still not clear with the implementation of PROG_MTR, PROG_SFP section.

As per Figure 8 and Table 5. PROG_SFP shall be changing state based on PORESET_B and Completion of fuse programming.

Is there any status / indication to intimate that fuse programming is completed so that by using external board components i can bring the value of 1.8V signal to 0V. Please confirm.

Also please confirm on state of PROG_MTR signal. This should be connected to GND whether trust architecture is in-use or not?

Regards,

Mani