PixArt Imaging Inc.
Low Power LED Integrated Slim Mouse Sensor
NCS
5
A
4
A
1
6
7
A
8
9
10
11
12
13
14
D
15
D
16
D
1
2
A
3
2
A
SCLK
MOSI
1
A
A
A
D
D
D
D
D
1
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
6
MISO
MOSI DRIVEN BY MICRO-CONTROLLER
Figure 11. Write operation
SCLK
MOSI
t
hold, MOSI
t
setup, MOSI
Figure 12. MOSI setup and hold time
Read Operation
A read operation, defined as data going from the ADNS-
3530 to the microcontroller, is always initiated by the
microcontroller and consists of two bytes. The first byte
contains the address, is sent by the microcontroller over
MOSI, and has a “0” as its MSB to indicate data direction.
The second byte contains the data and is driven by the
ADNS-3530 over MISO. The sensor outputs MISO bits on
falling edges of SCLK and samples MOSI bits on every
rising edge of SCLK.
NCS
SCLK
CYCLE #
5
A
4
A
1
6
7
A
8
9
10
11
12
13
14
15
16
3
2
A
SCLK
MOSI
1
A
A
A
0
6
5
4
3
2
1
D
D
D
D
D
D
D
D
0
MISO
7
6
5
4
3
2
1
t
SRAD DELAY
Figure 13. Read operation
SCLK
t
HOLD-MISO
t
DLY-MISO
MISO
D
0
Figure 14. MISO delay and hold time
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12
PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
