PixArt Imaging Inc.

PAW3501UI

USB Optical Mouse Sensor Single Chip

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9

PixArt Imaging Inc.

V2.1 April. 2008

6. Referencing Application Circuit

6.1 Typical Application for PAW3501UI with Mechanical Encoder

C5

0.1uF

RFU

SW3

BL

SW2

BM

R9

1M

VCC_5V

R5

0?

+

C4

1uF

R8

1M

ENSW1

ENCODER

1

2

3

Z2

Z1

COM

C3

0.1uF

VDDQ

VCC_5V

D-

D+

R2

0?

VCC_5V

SW1

BR

RFU

VCC_5V

Note:

Please connect the RFU pin to USB connector shell

for future use,

PAW3501UP used the pin to switch USB or PS/2.

U1

PAW3501UI

22

3

24

2

23

7

19

6

5

18

16

20

17

21

1

9

15

4

8

10

11

12

14

13

BR

SR

TEST

Z2

RFU

DT

OSCOUT

BL

BM

OSCIN

VSS

D+

VDDQ

D-

Z1

B5

VDD5V

IRCTL

B4

CPI

VSSLED

LED

VREFA

VREFB

PIN7(DT)

PULL LOW

=> 3D3B

PULL HIGH => 2D2B

FLOATING

=> 3D5B

D1

LED

D-

R3

0?

SW4

B4

SW5

B5

PIN3(SR):

PULL LOW

=> -90 degree

PULL HIGH => +90 degree

FLOATING

=>

0 degree

X1

18.000MHZ

R7

0?

1uF

R4

0?

R1

PIN10(CPI)

PULL LOW

=> 800CPI

PULL HIGH => 600CPI

FLOATING

=> 400CPI

R6

0?

VCC_5V

VCC_5V

VCC_5V

+

C2

10uF

D+

J1

USB CABLE

1

2

3

4

5

Figure 6. Application Circuit for PAW3501UI (Mechanical Encoder)