10 Nov
2017
10 Nov
'17
12:25 p.m.
Regarding overheating: Since class 0 AVS isn't implemented yet (afaik?), it may be worth checking how the core/mpu/mm voltages that are used compare to those specified by efuse on the individual boards. Voltages high enough to allow weak-process dies to run stably cause excessive current and therefore heat on strong-process dies.
The efuse-specified voltages (in mV) can be found in the lower 12 bits of the following registers: 4a0021d8 vdd_core (OPP_NOM) 4a0021c4 vdd_mpu (OPP_NOM – 1 GHz) 4a0021c8 vdd_mpu (OPP_HIGH – 1.5 GHz) 4a0021a4 vdd_mm (OPP_NOM) 4a0021a8 vdd_mm (OPP_OD)
Matthijs