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ADNS-3040 Datasheet(PDF) 12 Page - Agilent(Hewlett-Packard)

Part No. ADNS-3040
Description  Ultra Low-Power Mouse Sensor
Download  26 Pages
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Maker  HP [Agilent(Hewlett-Packard)]
Homepage  http://www.home.agilent.com
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ADNS-3040 Datasheet(HTML) 12 Page - Agilent(Hewlett-Packard)

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12
A
6
A
5
A
2
A
3
A
4
A
0
A
1
D
7
D
4
D
5
D
6
D
0
D
1
D
2
D
3
15
789
10
11
12
13
14
16
2
34
56
1
SCLK
MOSI
MOSI Driven by Micro Controller
1
1
1
A
6
2
NCS
MISO
Figure 13. Write Operation
Figure 14. MOSI Setup and Hold Time
Read Operation
A read operation, defined as
data going from the ADNS-
3040 to the micro-controller, is
always initiated by the micro-
controller and consists of two
bytes. The first byte contains
the address, is sent by the
micro-controller 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-
3040 over MISO. The sensor
outputs MISO bits on falling
edges of SCLK and samples
MOSI bits on every rising edge
of SCLK.
1
2
3
4
5
6
7
8
SCLK
Cycle #
SCLK
MOSI
0
A
6
A
5
A
4
A
3
A
2
A
1
A
0
9
10
11
12
13
14
15
16
MISO
D
6
D
5
D
4
D
3
D
2
D
1
D
0
D
7
NCS
t
SRAD delay
Figure 15. Read Operation
Figure 16. MISO Delay and Hold Time
NOTE:
The 0.5/fSCLK minimum high state of SCLK is
also the minimum MISO data hold time of the
ADNS-3040. Since the falling edge of SCLK is
actually the start of the next read or write
command, the ADNS-3040 will hold the state of
data on MISO until the falling edge of SCLK.
SCLK
MOSI
tsetup,MOSI
tHold,MOSI
SCLK
MISO
D0
tHOLD MISO
tDLY - MISO
Write Operation
Write operation, defined as
data going from the micro-
controller to the ADNS-3040,
is always initiated by the
micro-controller and consists
of two bytes. The first byte
contains the address (seven
bits) and has a “1” as its MSB
to indicate data direction. The
second byte contains the data.
The ADNS-3040 reads MOSI
on rising edges of SCLK.


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