5

Typical USB Application using

Quadrature Output

18 or 24 MHz Operation

Notes:

1. Due to the Cypress implementation of USB suspend mode support, the NRESET pin of the ADNS-2001 must be reset using a line from the Cypress

chip. The reason for this is that the Cypress chip does not configure the port input pins until after it has received a bus reset from the USB port.

The unconfigured input port pins present a 16 K

seeing a high on the MODE pin and powering up in the PS/2 mode.

2. The quadrature input pins of the Cypress part must be programmed to be Hi-Z, instead of the normal current pulldowns. This ensures that the

ADNS-2001 will be able to pull the quadrature lines high over all conditions of voltage and temperature.

3. 0.1

µF between pins 7 and 8 must be ceramic, and must be trace lengths less than 5 mm.

VDD5

VDD5

13

14

2

MODE/XA

XB

3

YB

4

YA

5

15

D–

D+

GND GND

10

12

24.00 MHz

0.1 µF

7

8

0.1 µF

1.0 µF

REFB

XY_LED

NRESET

6

3.3 V

REGULATOR

LP2950ACZ-3.3

R1

2N3904

HLMP-ED80

SURFACE

VDD

VDD3

HDNS-2100

LENS

INTERNAL

IMAGE

SENSOR

ADNS

2001

OSC1

OSC2

9

11

24.00 MHz CERAMIC RESONATOR

SUCH AS:

AVX

KBR-24.00MSA or

MURATA

CSA24.00MXZ040

PS2_C PS2_D

116

D–

13

D+

14

XTALIN

10

11

P0.4 P0.5

20

19

5

2

P0.1

P0.2

XTALOUT

3

P1.0

CYPRESS

CY7C63000A-PC

P0.3

P0.2

4

15

P0.7 P0.6

L

R

P1.2

6

M

17

18

VPP

8

VSS

7

BUTTONS

PANASONIC

EVQ SERIES

ENCODER

P1.1

P0.0 1

16

4.7 µF

0.1 µF

12

VDD

9

CEXT

2N3906

1.5 M

Ω

7.5 K

Ω

GND

SHLD

6 MHz

2.7

Ω

0.33 µF