VD5377 datasheet(54/88 Pages) STMICROELECTRONICS

Nome de Peças	VD5377

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

PDF	88 Pages

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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VD5377

54/88

Doc ID 022952 Rev 2

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9.1

I2C image capture

The chip can acquire a single frame coming from the image array (either CDS, exposed or

black frame), store it internally (in RAM), and deliver its 400 pixels through I2C registers. A

maximum of 105 frames per second can be achieved in this mode.

The timing diagram (Figure 23) describes the sequence of steps carried out within a

complete frame in I2C frame dump mode.

Figure 23. I2C frame dump timing diagram

Table 32 lists the registers related to the control of the I2C frame dump mode.

framedump_en

framedump_ready

framedump_pixdata

framedump_done

black

DMIB out

Actual2 RAM address

CDS out

398 399

pixel address

exposed

- black

Actual2 RAM R/W#

0 ... 399

398 399

I2C coms

tsetup > 250us

tframe > 9.4ms

1: Startup sequence of I2C frame dump mode

2: I2C multiple read of 400 bytes

3: Exit sequence of I2C frame dump mode

0: Init sequence of I2C frame dump mode

VD5377 Folha de dados(PDF) 54 Page - STMicroelectronics