PixArt Imaging Inc.

PAW3501UI

USB Optical Mouse Sensor Single Chip

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10

PixArt Imaging Inc.

V2.1 April. 2008

6.2 Typical Application for PAW3501UI-PX with Optical Encoder

VCC_5V

R1

Z1

Z1

PIN10(CPI)

PULL LOW

=> 800CPI

PULL HIGH => 600CPI

FLOATING

=> 400CPI

VDDQ

R4

0?

SW2

BM

Z2

+

C4

1uF

SW3

BL

SW1

BR

D+

U2

PT

PIN7(DT)

PULL LOW

=> 3D3B

PULL HIGH => 2D2B

FLOATING

=> 3D5B

D-

D1

LED

VCC_5V

J1

USB CABLE

1

2

3

4

5

C3

0.1uF

R6

0?

VCC_5V

Note:

1. Please connect the RFU pin to USB connector shell

for future use,

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

2. For resistor value selection, refer to high or low input

level of Z1 and Z2 in the D.C. Electrical Characteristics

table.

The recommended value for R10 is 470ohm.

The recommended value for R11/R12 is 5.1Kohm.

PIN3(SR):

PULL LOW

=> -90 degree

PULL HIGH => +90 degree

FLOATING

=>

0 degree

X1

18.000MHZ

IRCTL

+

C2

10uF

R9

1M

R10

470

C5

0.1uF

D-

VCC_5V

R2

0?

D1

IR

R8

1M

R5

0?

Q1

2N3906

RFU

R7

0?

VCC_5V

SW5

B5

IRCTL

U1

PAW3501UI-PX

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

VCC_5V

RFU

R11

5.1K

R12

5.1K

SW4

B4

Z2

1uf

R3

0?

VCC_5V

D+

Figure 7. Application Circuit for PAW3501UI-PX (Optical Encoder)