VD5377 datasheet(66/88 Pages) STMICROELECTRONICS

No. de pieza	VD5377

Descripción Electrónicos	Ultra-low power motion sensor for optical finger navigation (OFN)

PDF	88 Pages

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Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

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66 / 88 page

I2C interface

VD5377

66/88

Doc ID 022952 Rev 2

Figure 31. Single read

As mentioned in the previous example, the read message is terminated with a negative

acknowledge (A) from the master.

11.4.3

Multiple location write

It is possible to write data bytes to consecutive adjacent internal registers without having to

send explicit indexes prior to sending each data byte.

Note:

An auto-increment write is assumed if no stop condition occurs.

Figure 32. Multiple location write

11.4.4

Multiple location read

Multiple locations can be read within a single read message. An auto-increment write is

assumed.

Note:

Registers are read until the master NAcks the data.

Figure 33. Multiple location read: reading motion

Note:

When reading X/Y motion data a multiple read must be performed.

A6h

2Ah

A7h

No data write

Read data

from the master

NAck

Master

Slave

A6h

07h

Incremental write

data written

@ index = 08

data written

@ index = 07

Master

Slave

Incremental read

A6h

21h

X motion

Y motion

No data write

A7h

Master

Slave

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