Typical USB Application using
Quadrature Output
18 or 24 MHz Operation
2N3906
2.7 Ω
3.3 V
REGULATOR
LP2950ACZ-3.3
1.0 µF
0.1 µF
0.1 µF
4.7 µF
0.1 µF
1.5 MΩ
R1
7
7.5 KΩ
V
3
DD
REFB
13
8
9
CEXT
12
V
5
P1.0
V
V
5
5
DD
0.33 µF
DD
14
2
DD
HLMP-ED80
2
P0.1
MODE/XA
XB
SURFACE
6
9
3
1
3
V
P0.0
P0.2
P0.3
P1.1
P0.2
XY_LED
OSC1
2N3904
DD
4
13
14
10
YB
D–
D–
CYPRESS
CY7C63000A-PC
ADNS
2001
5
4
D+
D+
YA
24.00 MHz
16
15
15
11
24.00 MHz CERAMIC RESONATOR
SUCH AS:
GND
NRESET
XTALIN
OSC2
SHLD
6 MHz
AVX
KBR-24.00MSA or
MURATA CSA24.00MXZ040
GND GND PS2_C PS2_D
10 12 16
11
XTALOUT
P0.4 P0.5 P1.2 VSS VPP P0.7 P0.6
20 19 18 17
1
6
7
8
PANASONIC
EVQ SERIES
ENCODER
INTERNAL
IMAGE
SENSOR
HDNS-2100
LENS
BUTTONS
L
R
M
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 KΩ pullup to V . If a cap is used on NRESET (pin 15), this pullup will result in the ADNS-2001
CC
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.
5
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
