AFE4490 datasheet(20/85 Pages) TI2

부품명	AFE4490

상세설명	AFE4404 Ultra-Small, Integrated AFE for Wearable, Optical, Heart-Rate Monitoring and Bio-Sensing

PDF	85 Pages

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제조업체	TI2 [Texas Instruments]

홈페이지	https://www.ti.com

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20 / 85 page

I2C_DAT

I2C_CLK

START

Condition (S)

STOP

Condition (P)

I2C_DAT

I2C_CLK

Data Line

Stable Data

Data Line

Transition

Allowed

AFE4404

SBAS689D – JUNE 2015 – REVISED DECEMBER 2016

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8.3.5 I2C Interface

The AFE has an I2C interface for communication. The I2C_CLK and I2C_DAT lines require external pullup

resistors to IO_SUP. See the I2C protocol standards documents for details of the I2C interface. This section only

describes certain key features of the interface. The data on I2C_DAT must be stable during the high level of

I2C_CLK and may transition during the low level of I2C_CLK, as shown in Figure 28.

Figure 28. Allowed Transition of I2C_DAT while Transmission of Data Bits

The start condition is indicated by a high-to-low transition of the I2C_DAT line when the I2C_CLK is high. A stop

condition is indicated by a low-to-high transition of the I2C_DAT line when the I2C_CLK is high. Figure 29 shows

the start and stop conditions.

Figure 29. Transition of I2C_DAT during Start and Stop Conditions

AFE4490 데이터시트(PDF) 20 Page - Texas Instruments