Math
Timer
\[
f_{end}=\frac{f_{initial}}{PreScaler \cdot (f_{ARR})}\\
f_{ARR}=\frac 1 {ARR + 1}
\]
ADC
\[
\begin{flalign}
&1 LSB = \frac{V_{REF}}{2^N}\\
&\text{Full Scale Range (FSR): } V_{FSR}=V_{REF}- LSB \\
&\text{Max Sample Rate: } f_{max}=\frac{f_{ADC}}{PreScaler}
\end{flalign}
\]
Cache
\[
Access Time=HitTime + MissRate\cdot MissPenality
\]
\[
\begin{align}
HitRate &= \frac{NrOfHits}{NrOfAccess}\\
MissRate &= \frac{NrOfMiss}{NrOfAccess}=1 - HitRate\\
\end{align}
\]
Performance
\[
impact=f_{int}\cdot t_{ISR}\cdot 100\%
\]
C Code
Read Current Value in Memory
uint8_t a = *((volatile uint8_t*) (0x61000007));
// or
#define A_REG (*((volatile uint8_t*) (0x61000007)))
uint8_t a2 = A_REG;
Change Specific Bit
In this example, bit 16 is manipulated.