FS98O21 datasheet(4/136 Pages) FORTUNE

4 / 136 page

FS98O21

Rev. 1.7

4/136

CLOCK SYSTEM ..................................................................................................................................... 39

5.1

Oscillator State ............................................................................................................................ 40

5.2

CPU Instruction Cycle ................................................................................................................ 42

5.3

ADC Sample Frequency ............................................................................................................. 43

5.4

Beeper Clock ............................................................................................................................... 44

5.5

Voltage Doubler Operation Frequency ......................................................................................46

5.6

Chopper Operation Amplifier Input Control Signal ..................................................................47

5.7

TMCLK -- Timer and LCD Module Input Clock.......................................................................... 48

TIMER MODULE AND WATCH DOG TIMER...........................................................................................49

6.1

Timer Module............................................................................................................................... 51

6.1.1

Timer module interrupt ................................................................................................... 52

6.1.2

Using Timer with External/Internal Clock......................................................................53

6.2

Watch Dog Timer......................................................................................................................... 55

I/O PORT .................................................................................................................................................. 56

7.1

Digital I/O Port with Analog Input Channel Shared: PT1[7:0] ..................................................65

7.2

Digital I/O Port and External Interrupt Input : PT2[0], PT2[1] ..................................................66

7.3

Digital I/O Port or PDM Output : PT2[2] ..................................................................................... 69

7.4

Digital I/O Port or I2C Serial Port : PT2[3]/SDA, PT2[4]/SCL....................................................71

7.5

Digital I/O Port : PT2[6:5] ............................................................................................................ 73

7.6

Digital I/O Port or Buzzer Output : PT2[7] ................................................................................. 75

PDM (PULSE DENSITY MODULATOR) MODULE ..................................................................................77

I2C MODULE (SLAVE MODE ONLY) ...................................................................................................... 83

10. ANALOG FUNCTION NETWORK ........................................................................................................... 90

10.1

Analog to Digital Converter (ADC) : .......................................................................................... 99

10.2

OPAMP : OP1............................................................................................................................. 103

11. ADC APPLICATION GUIDE ................................................................................................................... 105

11.1

ADC Output Format .................................................................................................................. 105

11.2

ADC Linear Range.....................................................................................................................105

11.3

ADC Output Rate and Settling Time ........................................................................................105

11.4

ADC Input Offset ....................................................................................................................... 105

11.5

ADC Digital Output.................................................................................................................... 106

11.6

ADC Resolution......................................................................................................................... 106

12. LOW NOISE OPERATION AMPLIFIER GUIDE ..................................................................................... 107

12.1

Single End Amplifier Application............................................................................................. 107

12.2

Differential Amplifier ................................................................................................................. 108

13. LCD DRIVER .......................................................................................................................................... 109

14. HALT AND SLEEP MODES ................................................................................................................... 121

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