Chapter 7 AD/DA Converter
PCF8591
The PCF8591 is a single-chip, single-supply low power 8-bit CMOS data acquisition device with four analog
inputs, one analog output and a serial I2C-bus interface. The following table is the pin definition diagram of
PCF8591.
Analog inputs (A/D converter)
I2C-bus data input/output
external/internal switch for oscillator
input
Analog output(D/A converter)
For more details about PCF8591, please refer to datasheet.
I2C communication
I2C(Inter-Integrated Circuit) is a two-wire serial communication mode, which can be used to connection of
micro controller and its peripheral equipment. Devices using I2C communication must be connected to the
serial data (SDA) line, and serial clock (SCL) line (called I2C bus). Each device has a unique address and can be
used as a transmitter or receiver to communicate with devices connected to the bus.
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