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How the I2C Bus Works - EEWeb

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Supply<br />

SDA<br />

SCL<br />

POR<br />

I 2 C-bus<br />

interface<br />

Sub<br />

address<br />

decoder<br />

Analog to Digital Converter<br />

Oscillator, intern /<br />

extern<br />

Data<br />

registers<br />

Analog<br />

reference<br />

-<br />

+<br />

-<br />

+<br />

-<br />

+<br />

Semiconductors 84<br />

-<br />

+<br />

-<br />

+<br />

-<br />

+<br />

KEY POINTS<br />

- Converts signals from<br />

digital to analog and<br />

analog to digital<br />

FEATURES<br />

- 4 channel A to D<br />

- 1 channel D to A<br />

- Internal oscillator<br />

- Power On Reset (POR)<br />

Voltage range Max I 2 C freq Resolution<br />

PCF8591 2.5 - 5.5V w/5V tolerance 100 kHz 8-bit

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