Figure 15. Hsi Auto Trimming Block Diagram - Holtek HT32F12345 User Manual

32-Bit Arm ® Cortex ® -M3 MCU
HT32F12345
Auto Trimming HSI Block Diagram
1
0
TMSEL
External pin (CKIN)
USB SOF
LSE
32.768 kHz
1
Factory
Trimming Bits
0
TRIMEN

Figure 15. HSI Auto Trimming Block Diagram

Rev. 1.10
Auto Trimming
1
1 kHz
/1.024 kHz
/32 0
REFCLKSEL
Fine-Trimming
Read Register
Fine [7:0]
Coarse [4:0]
86 of 590
Fine-Trimming
Write Register
ATCEN
AT
Counter
Register
Controller
8 MHz
8 MHz HSI
Oscillator
Coarse-Trimming
Read Register
November 28, 2018