PixArt Imaging Inc.

PAN3501UI

USB Optical Mouse Sensor Single Chip

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10

PixArt Imaging Inc.

V1.0, APR. 2005

5.2 Typical Application for PAN3501UI-PX with Optical Encoder

Z2

SW1

BR

+

C2

10uF

VCC_5V

IRCTL

R9

1M

+

C4

1uF

SW5

B5

Z2

D+

R6

0?

VCC_5V

RFU

PIN3(SR):

PULL LOW

=> -90 degree

PULL HIGH => +90 degree

FLOATING

=>

0 degree

D1

IR

R7

0?

VCC_5V

RFU

VCC_5V

R5

5.1K

SW2

BM

R2

0?

R3

0?

U2

PT

VCC_5V

Z1

PIN10(CPI)

PULL LOW

=> 800CPI

PULL HIGH => 600CPI

FLOATING

=> 400CPI

D1

LED

SW3

BL

X1

18.000MHZ

D-

IRCTL

VCC_5V

R5

0?

PIN7(DT)

PULL LOW

=> 3D3B

PULL HIGH => 2D2B

FLOATING

=> 3D5B

J1

USB CABLE

1

2

3

4

5

VDDQ

R4

0?

1uf

R6

470

D-

SW4

B4

C5

0.1uF

C3

0.1uF

Q1

2N3906

D+

R1

R8

1M

Z1

R4

5.1K

Note:

1. Please connect the RFU pin to USB connector shell

for future use,

PAN3501UP 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 R2 is 470ohm.

The recommended value for R3/R4 is 5.1Kohm.

VCC_5V

U1

PAN3501UI-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

Figure 8. Application circuit for PAN3501UI-PX (Optical Encoder)