PAW3601DH-NF Datasheet, PDF (17/35 Pages) Pixart Imaging Inc. – laser diode form a complete and compact laser mouse tracking system

PixArt Imaging Inc.
PAW3601DH-NF
CMOS Laser Mouse Sensor
7.1.2 Read Operation
A read operation, which means that data is going from the mouse sensor to the mouse controller, is always
initiated by the mouse controller and consists of two bytes. The first byte contains the address, is written by the
micro controller, and has a “0” as its MSB to indicate data direction. The second byte contains the data and is
driven by the mouse sensor. The transfer is synchronized by SCLK. SDIO is changed on falling edges of SCLK
and read on every rising edge of SCLK. The mouse controller must go to a high Z state after the last address data
bit. The mouse sensor will go to the high Z state after the last data bit.
SCLK
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SDIO
DO N 'T
CARE
0
A6 A5
A4 A3
H i-Z
A2 A1 A0 D7 D6
D5 D4
D3 D2
H i-Z_{_}
D 1 D 0 R/W bit of next
address
SDIO driven by the m ouse controller
SDIO driven by the m ouse sensor
Note "A"
Note "B"
N ote "A " ^{1. The m ouse controller sends address to the m ouse sensor.}
2. T he m ouse controller releases and set SD IO to H i-Z after the last address bit.
SCLK
7
SDIO
A1
8
A0
H i-Z
9
D7
t_HOLD
3us,m in
Note "B" 1. The m ouse sensor sends data to the m ouse controller .
2. T he m ouse sensor releases and set SD IO to H i-Z after the last data bit.
SCLK
16
SD IO
D0
H i-Z
_
1
R/W bit of next address
SDIO driven by the mouse controller
Figure 11. Read Operation
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PixArt Imaging Inc.
E-mail: [e-mail]
V2.2, Aug. 2007