FS98O21 datasheet(13/136 Pages) FORTUNE

13 / 136 page

FS98O21

Rev. 1.7

13/136

Pin Description

Table 1-2 FS98O21 pin description

Name

In/Out/Power

Pin No

Description

TST

Testing Mode

RST

CPU Reset

VPP

Programming Power Supply

OP1O

I/O

OPAMP 1 Output

REFO

Band gap Reference Output

FTB, FTC

I/O

7, 8

ADC Pre-Filter Capacitor Connection

I/O

VDDA Capacitor Connection

AGND

Analog Ground

PT1<0~5>/AIN0~5

I/O

11~16

Digital I/O Port or Analog input channel

PT2<0~1>/INT0~1

I/O

19~20

Digital I/O Port and External Interrupt input

PT2<2>/PDM1

I/O

Digital I/O Port or PDM output

PT2<3>/SDA

I/O

Digital I/O Port or I2C serial Bi-Directional data line

PT2<4>/SCL

I/O

Digital I/O Port or I2C clock input

PT1<6~7>,

PT2<5~6>

I/O

17~18

24~25

Digital I/O Port

PT2<7>/BZ

I/O

Digital I/O Port or Buzzer Output

SEG12~SEG1

33~44

LCD Segment Driver Output

COM4~COM1

45~48

LCD Common Driver Output

LCA

I/O

LCD Charge Pump Capacitor Positive Connection

LCB

I/O

LCD Charge Pump Capacitor Negative Connection

V3,V2,V1

51~53

LCD Bias

VDDA

Analog Power Output

Voltage Source from VDDA

VGG

Charge Pump Voltage

VSSP

Charge Pump Power Supply Negative Connection

I/O

Charge Pump Capacitor Negative Connection

I/O

Charge Pump Capacitor Positive Connection

VDDP

Charge Pump Power Supply Positive Connection

VDD

Power Supply Positive Connection

VSS

Power Supply Negative Connection(Ground)

XOUT

32768Hz Oscillator Output

XIN

32768Hz Oscillator Input

No Connection

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