PMS133 datasheet(4/106 Pages) PADAUK

4 / 106 page

PMS133/PMS134

8bit OTP MCU with 12-bit ADC

Page 4 of 106

PDK-DS-PMS133/134-EN_V103 – Nov. 13, 2018

5.4.6.

System Clock Switching ............................................................................................40

5.5.

Comparator ...........................................................................................................................42

5.5.1

Internal reference voltage (Vinternal R)...........................................................................43

5.5.2

Using the comparator ................................................................................................45

5.5.3

Using the comparator and band-gap 1.20V ...............................................................46

5.6

VDD/2 LCD Bias Voltage Generator .....................................................................................46

5.7

16-bit Timer (Timer16) ..........................................................................................................47

5.8

8-bit Timer (Timer2/Timer3) with PWM generation ................................................................49

5.8.1

Using the Timer2 to generate periodical waveform ....................................................51

5.8.2

Using the Timer2 to generate 8-bit PWM waveform...................................................52

5.8.3

Using the Timer2 to generate 6-bit PWM waveform...................................................54

5.9

11-bit PWM Generator ..........................................................................................................55

5.9.1

PWM Waveform ........................................................................................................55

5.9.2

Hardware and Timing Diagram ..................................................................................56

5.9.3

Equations for 11-bit PWM Generator .........................................................................57

5.10

WatchDog Timer ...................................................................................................................57

5.11

Interrupt ................................................................................................................................58

5.12

Power-Save and Power-Down ..............................................................................................60

5.12.1 Power-Save mode (“stopexe”) ...................................................................................61

5.12.2 Power-Down mode (“stopsys”) ..................................................................................61

5.12.3 Wake-up....................................................................................................................62

5.13

IO Pins ..................................................................................................................................63

5.14

Reset and LVR......................................................................................................................64

5.14.1 Reset.........................................................................................................................64

5.14.2 LVR reset ..................................................................................................................64

5.15

Analog-to-Digital Conversion (ADC) module .........................................................................64

5.15.1 The input requirement for AD conversion ..................................................................65

5.15.2 Select the reference high voltage ..............................................................................66

5.15.3 ADC clock selection...................................................................................................66

5.15.4 Configure the analog pins..........................................................................................66

5.15.5 Using the ADC...........................................................................................................67

5.16

Multiplier ...............................................................................................................................68

6. IO Registers ........................................................................................................................ 69

6.1.

ACC Status Flag Register (flag), IO address = 0x00 .............................................................69

6.2.

Stack Pointer Register (sp), IO address = 0x02 ....................................................................69

6.3.

Clock Mode Register (clkmd), IO address = 0x03 .................................................................69

6.4.

Interrupt Enable Register (inten), IO address = 0x04 ............................................................70

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