ADNK-2080 Avago Technologies US Inc., ADNK-2080 Datasheet - Page 15

• Manufacturer Part Number: ADNK-2080
• Description: ADNS-2080 Sample Kit
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNK-2080

• Main Purpose: Reference Design, Optical Mouse
• Embedded: No
• Utilized Ic / Part: ADNS-2080
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Details
• Other names: 516-2296

Read Operation
A read operation, defined as data going from the slave 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 slave SDIO, and has a “0”
as its MSB to indicate data direction. The second byte contains the data and is driven by the slave over SDIO. The sensor
outputs data bits on falling edges of SCLK.
NCS
SCLK
Cycle #
SCLK
SDIO
t
SDIO delay and hold time during read operation
Required Timing between Read and Write Commands
There are minimum timing requirements between read and write commands on the serial port.
Timing between Two Write Commands
If the rising edge of the SCLK for the last data bit of the second write command occurs before the required delay (t
then the first write command may not complete correctly.
SCLK
15
DLY-READ
SCLK
SDIO
1
0
ADDRESS
2
A
6
WRITE OPERATION
D
0
t
HOLD-READ
A
3
5
4
A
4
DATA
5
A
3
6
A
2
A
7
1
A
0
8
ADDRESS
Note: The 500 ns minimum high state of SCLK is also the minimum
SDIO data hold time of the ADNS-2080. Since the falling edge of SCLK is
actually the start of the next read or write command, the ADNS-2080 will
hold the state of data on SDIO until the falling edge of SCLK.
9
D
t
7
SWW
WRITE OPERATION
t
SRAD DELAY
10
D
6
11
D
5
DATA
12
D
4
13
D
3
14
D
2
15
D
1
SCLK-NCS
16
D
0
SWW
),