8
Block Diagram
ZB
ZA
IMAGE
PROCESSOR
Z WHEEL
POWER
ON
RESET
LGND
XY_LED
LED
DRIVE
OSCILLATOR
OSCILLATOR
LED
OSC_IN
OSC_OUT
VOLTAGE
REFERENCE
D
D +
USB
PORT
5 VOLT
POWER
Vdd3
GND
Vdd5
GND
BUTTONS
CONTROL AND
I/O PROCESSOR
GND
TL/B4
B3
B2
B1
TR/B5
ZLED
V
O
L
T
A
G
E
R
E
G
U
L
A
T
O
R
Figure 6. Block Diagram
PCB Assembly Considerations
1. Insert the sensor and all other electrical components
into PCB.
2. Bend the LED leads 90 degrees and then insert the LED
into the assembly clip until the snap feature locks the
LED base.
3. Insert the LED/clip assembly into PCB.
4. This sensor package is only quali ed for wave-solder
process.
5. Wave Solder the entire assembly in a no-wash solder
process utilizing solder xture. The solder xture
is needed to protect the sensor during the solder
process. It also sets the correct sensor to PCB distance,
as the lead shoulders do not normally rest on the PCB
surface. The xture should be designed to expose
the sensor leads to solder while shielding the optical
aperture from direct solder contact. A solder xture
MUST be used to set the correct sensor to PCB distance.
6. Place the lens onto the base plate.
7. Remove the protective Kapton tape from optical
aperture of the sensor. Care must be taken to
keep contaminants from entering the aperture.
Recommend not placing the PCB facing up during the
entire mouse assembly process. Recommend to hold
the PCB rst vertically for the Kapton removal process.
8. Insert PCB assembly over the lens onto base plate
aligning post to retain PCB assembly. The sensor
aperture ring should self-align to the lens.
9. The optical position reference for the PCB is set by the
base plate and lens. Note that the PCB motion due to
button presses must be minimized to maintain optical
alignment.
10. Install mouse top case. There MUST be feature in the
top case to press down onto the clip to ensure all
components are interlocked to correct vertical height
