STM32G431: HSI16 — are fHSI16 (@30 °C) and Δtemp(HSI16) additive? (DS12589 Rev 2, Table 44) Hi,I am using STM32G431CBU6 with HSI16 as the only clock source (no external crystal on the board), and I need to budget the resulting frequency error. I have a few questions about DS12589 Rev 2 (October 2019), Table 44 "HSI16 oscillator characteristics", page 107, and Figure 23 on the same page.Q1 (main question) — Are fHSI16 and Δtemp(HSI16) additive, or is Δtemp inclusive?Table 44 lists two separate parameters:Symbol Conditions Min Max fHSI16 VDD = 3.0 V, TA = 30 °C 15.88 MHz 16.08 MHz Δtemp(HSI16) TA = 0 to 85 °C −1 % +1 % For a single device over the 0 to 85 °C range, is the worst-case total frequency error:(a) −7500 ppm − 10000 ppm = −17500 ppm … +5000 ppm + 10000 ppm = +15000 ppm (i.e. the two parameters add), or (b) ±10000 ppm (i.e. Δtemp already includes the initial tolerance at 30 °C)?This makes a large practical difference for bit-timing budgets, so I would like to be sure.Q2 — Is a typical temperature coefficient (ppm/°C) available?Figure 23 shows mean/
