PMS234 datasheet(4/107 Pages) PADAUK

4 / 107 page

PMC234/PMS234 Series

12-bit ADC Enhanced FPPA

8-bit Controller

Page 4 of 107

PDK-DS-PMX234_V103 – Dec. 19, 2018

5-3. Program Structure ...............................................................................................................35

5-3-1. Program structure of two FPP units mode................................................................35

5-3-2. Program structure of single FPP mode.....................................................................35

5-4. Boot Procedure....................................................................................................................36

5-5. Data Memory -- SRAM.........................................................................................................37

5-6. Arithmetic and Logic Unit .....................................................................................................37

5-7. Oscillator and clock..............................................................................................................38

5-7-1. Internal High RC oscillator and Internal Low RC oscillator........................................38

5-7-2. Chip calibration ........................................................................................................38

5-7-3. IHRC Frequency Calibration and System Clock .......................................................38

5-7-4. External Crystal Oscillator ........................................................................................40

5-7-5. System Clock and LVR level ....................................................................................41

5-7-6. System Clock Switching ...........................................................................................42

5-8. 16-bit Timer (Timer16) .........................................................................................................43

5-9. 8-bit Timer (Timer2) with PWM generation...........................................................................45

5-9-1. Using the Timer2 to generate periodical waveform ..................................................46

5-9-2. Using the Timer2 to generate 8-bit PWM waveform .................................................48

5-9-3. Using the Timer2 to generate 6-bit PWM waveform .................................................49

5-10. WatchDog Timer................................................................................................................50

5-11. Interrupt .............................................................................................................................51

5-12. Power-Save and Power-Down ...........................................................................................53

5-12-1. Power-Save mode (“stopexe”) ...............................................................................53

5-12-2. Power-Down mode (“stopsys”) ...............................................................................54

5-12-3. Wake-up ................................................................................................................55

5-13. IO Pins...............................................................................................................................56

5-14. Reset and LVR ..................................................................................................................57

5-14-1. Reset .....................................................................................................................57

5-14-2. LVR (low voltage reset)..........................................................................................57

5-15. Comparator........................................................................................................................58

5-15-1. Comparator Hardware Diagram .............................................................................58

5-15-2. Analog Inputs .........................................................................................................59

5-15-3. Internal reference voltage (Vinternal R) .......................................................................60

5-15-4. Comparator Interrupt Operation .............................................................................62

5-15-5. Synchronizing Comparator Output to Timer2 .........................................................62

5-15-6. Comparator Response Time ..................................................................................62

5-15-7. Using the comparator.............................................................................................63

5-15-8. Using the comparator and band-gap 1.20V ............................................................64

5-16. LCD Bias Voltage Generator..............................................................................................65

5-17. Analog-to-Digital Conversion (ADC) module ......................................................................66

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