ADNS-2620 Avago Technologies US Inc., ADNS-2620 Datasheet - Page 12

• Manufacturer Part Number: ADNS-2620
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-2620

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 516-2238-5; ADNS-2620; Q2073278A

Synchronous Serial Port
The synchronous serial port is used to set and read
parameters in the ADNS-2620, and also to read out the
motion information.
The port is a two wire, half duplex port. The host micro-
controller always initiates communication; the ADNS-
2620 never initiates data transfers.
SCK:
the master (the microcontroller).
SDIO:
Cycle #
Figure 19. Write operation.
SDIO
Figure 20. SDIO setup and hold times SCK pulse width.
1
SCK
SDIO
SCK
SCK
250 ns
The serial port clock. It is always generated by
The data line.
t
setu p
1
250 ns
1
= 60 ns, min
A
2
250 ns, min
6
3
A
5
4
A
4
A
5
3
6
A
2
7
A
1
SDIO Driven by Microcontroller
A
8
0
Write Operation
Write operations, where data is going from the micro-
controller to the ADNS-2620, 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 SCK. The microcon-
troller changes SDIO on falling edges of SCK. The ADNS-
2620 reads SDIO on rising edges of SCK.
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