ADNS-2610 View Datasheet(PDF) - Agilent Technologies, Inc

Part Name

Description

View to exact match

ADNS-2610

Optical Mouse Sensor

Agilent Technologies, Inc 

Forcing the SDIO Line to the

Hi-Z State

There are times when the SDIO

line from the ADNS-2610 should

be in the Hi-Z state. For example,

if the microprocessor has com-

pleted a write to the ADNS-2610,

the SDIO line will go into a Hi-Z

state, because the SDIO pin was

configured as an input. However,

if the last operation from the

microprocessor was a read, the

ADNS-2610 will hold the D0 state

on SDIO until a falling edge of

SCK.

To place the SDIO pin into a Hi-Z

state, activate the power-down

mode by writing to the configura-

tion register. Then, the power-

down mode can stay activated,

with the ADNS-2610 in the

shutdown state, or the power-

down mode can be deactivated,

returning the ADNS-2610 to

normal operation. In both

conditions, the SDIO line will go

into the Hi-Z state.

PD

Timing

PD

Activated

32

clock

cycles

SDIO

10 ns, max

Hi-Z

Figure 24. SDIO Hi-z state and timing.

Another method to set the SDIO

line into the Hi-Z state, while

maintaining the ADNS-2610 at

normal mode, is to write any

data to an invalid address such

as 0x00 to address 0x77. The

SDIO line will go into the Hi-Z

state after the write operation.

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