PAW3529DH-TXWA Datasheet, PDF (6/23 Pages) Pixart Imaging Inc. – USB OPTICAL MOUSE SINGLE CHIP

PixArt Imaging Inc.
PAW3529DH-TXWA
USB Optical Mouse Sensor Single Chip
3.5 CPI Switch and Indication
The PAW3529DH-TXWA supports CPI switch function that allows user change resolution between
1000/1600/600 through pressing the CPI button. And the corresponding indications will be shown by using
PWM output on the same pin, i.e. outputting different duty cycles for different resolution at fixed 1 KHz
frequency. It will cause the different brightness on LED. The CPI indication (PWM) output timing and
relationship between resolution and duty cycle are as follows,
Td
CPI
Tpwm
Figure 4. CPI Indication Timing
Resolution
1000 cpi
1600 cpi
600 cpi
PWM Low Duty
20%
90%
0%
LED Status
Less brightness
Much brightness
Dark
3.5.1 Available CPI Configuration
The PAW3529DH-TXWA supports flexible CPI configuration for changing default resolution. The available
resolutions are as follows. Note that 1000 is default value.
400
1000(default)
Available resolution (Unit: count/inch)
500
600
1200
1600
800
2000
3.5.2 Available CPI Switch Configuration
The PAW3529DH-TXWA supports flexible CPI switch configuration for changing switch level and indicator
behavior. With this configuration, must combination support 3-level switch. However, at boundary default
resolution, it supports only 2-level or 1-level switch. The available switch types are as follows. Note that 1000-
1600-600 is default type.
Available switch level and indicator behavior Look-up Table
Default resolution at 400 CPI
Switch PWM
Switch PWM
Switch PWM
Switch PWM
Type0 400 20% Type1 400 20% Type2 400
0% Type3 400
0%
600 90%
500 90%
600 20%
600 20%
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專利公示：本產品業經本公司獲得台灣專利第 509867, 530489, 529309, 560179, 526662, 554497, I230890, I287732 號專利在案。
PixArt Imaging Inc.
E-mail: [e-mail]
V1.2 Sep. 2010