PixArt Imaging Inc.

PAW3203DI

Wireless Optical Mouse Single Chip

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PixArt Imaging Inc.

V0.3 April. 2008

5.2 1.8V Application Circuit (with IR LED)

BAT_3.0V

LKEY

SW6

IR_1.8V

L2

220uH

C24

0.1uF

R7

100K

RFEN

RFosc

RFosc

B. Regulator

R1

170K

C10

0.1uF

C6

22pF

IR_1.8V

R5

10K

RFU

VR1

100K

VCC_1.8V

VCC_1.8V

RFID

D2

1N5819

C22

0.1uF

VCC_1.8V

RFcarrier

ISDA

#1. Battery Power Circuit

VIN PAD

U5

ELM9818

#2. EEPROM Circuit

Z2

Q1

2N3906

MKEY

+

C20

1uF

#3. RF TX Circuit

ISDA

* SW7

Z2

R3 10K

#4. Sensor Circuit

SW2

BAT_1.5V

SW5

Q1

2N3906

C13

100pF

A. DC/DC Converter

RFDATA

+

C21

10uF

+

C8

1uF

SW3

+

C30

47uF

VR2

100K

D1

RFcarrier

+

C33

22uF

RFDATA

LKEY

VCC_1.8V

X1

27.042MHZ

BatDetect

RKEY

RFID

BAT_1.5V

U4

PAW3203DI

20

17

23

2

24

15

6

3

21

7

14

16

8

13

1

19

10

22

4

18

9

5

11

12

BR

RFID

RFU

ZY2

BATLow

ISCK

OSCOUT

BL

BM

OSCIN

NC

ISDA

VDDD

B5

ZY1

RFEN

VDD

NC

B4

RFDATA

VSS

LED

VDDA

VREF

Optional power source: A or B

U1

ELM9318

VOUT

SW

VCC_1.8V

C12

100pF

BatDetect

SW1

C9

0.1uF

+

C11

1uF

R8

100K

U3

24AA02

A0

A1

A2

VSS SDA

SCL

WP

VCC

BatDetect

R2

470K

B4

B5

BAT_3.0V

SW4

VCC_1.8V

IR_1.8V

RFEN

ISCK

+

C31

100uF

VCC_1.8V

RKEY

+

C23

1uF

ENSW1

ENCODER

Z2

Z1

COM

Z1

+

C32

22uF

R6

Z1

Q3

3904

C18 10pF

B5

B4

C5

0.1uF

RFU

R4

10R

Q2

3904

* C19

MKEY

Note1: Please reserve C19, SW7 for future use

VCC_1.8V

ISCK

Figure 7. Application Circuit for 1.8V (with IR LED)