ADNS-2030 Avago Technologies US Inc., ADNS-2030 Datasheet - Page 16

• Manufacturer Part Number: ADNS-2030
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-2030

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Synchronous Serial Port
The synchronous serial port is used to set and read pa-
rameters in the ADNS-2030, and can be used to read out
the motion information instead of the quadrature data
pins.
The port is a two wire, half duplex port. The host micro-
controller always initiates communication; the ADNS-
2030 never initiates data transfers.
SCLK:
the master (the microcontroller).
SDIO: The data line.
PD: A third line is sometimes involved. PD (Power Down)
is usually used to place the ADNS-2030 in a low power
mode. PD can also be used to force re-synchronization
between the microcontroller and the ADNS-2030 in case
of an error.
Figure 24 . Write operation.
Figure 25. SDIO setup and hold times
SCLK pulse width.
1
Cycle #
SCLK
SDIO
SCLK
SCLK
SDIO
120 ns
The serial port clock. It is always generated by
t
setup
1
1
120 ns
= 60 ns, min
A
2
120 ns, min
6
3
A
5
4
A
4
5
A
3
6
A
2
7
A
1
SDIO Driven by Microcontroller
A
8
0
Write Operation
A write operation, which means that data is going from
the microcontroller to the ADNS-2030, is always initiated
by the microcontroller 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 transfer is synchronized by SCLK. The mi-
crocontroller changes SDIO on falling edges of SCLK. The
ADNS-2030 reads SDIO on rising edges of SCLK.
9
D
7
10
D
6
11
D
5
12
D
4
13
D
3
14
D
2
15
D
1
16
D
0
DON'T
CARE