PAW3602DH-NF Datasheet, PDF (17/33 Pages) Pixart Imaging Inc. – CMOS LASER MOUSE SENSOR

PixArt Imaging Inc.
PAW3602DH-NF
CMOS Laser Mouse Sensor
7.4 Power Down Mode
There are two different ways to entry power down mode, using the PD line or register setting.
7.4.1 PD Line Power Down Mode
To place the mouse sensor in a low power mode to meet USB suspend specification, raise the PD line at least
700us. Then PD line can stay high, with the mouse sensor in the shutdown state, or the PD pin can be lowered,
returning the mouse sensor to normal operation.
PD
t_PDW
700us,min
IDD
t_PD
500us
500us
90frames
t_PUPD
14.15ms
Figure 12. Power down minimum pulse width
PD
SCLK
SDIO
t_PDW
700us,min
Hi-Z
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
ADDRESS(R/W)
DATA
Figure 13. PD line power down mode
7.4.2 Register Power Down Mode
The mouse sensor can be placed in a power down mode by setting PD_enh bit in the configuration register via a
serial port write operation. After setting the configuration register, wait at least 1frame times. To get the chip out
of the power down mode, clear PD_enh bit in the configuration register via a serial port write operation. In the
power down mode, the serial interface watchdog timer is not available (see Section 7.2.2). But, the serial
interface still can read/write normally. For an accurate report after leave the power down mode, wait about 3ms
before the mouse controller is able to issue any write/read operation to the mouse sensor.
SCLK
SDIO
1234567891111111
0123456
Address = 0x06
Data = 0x08
1 00 0 0 1 10 0 0 0 0 1 00 0
1 frame, max
IDD
t_PDR
Figure 14. Power-down Configuration Register Writing Operation
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PixArt Imaging Inc.
E-mail: [e-mail]
V1.0, Jun. 2007