Description:
Features:
Single power supply
PCF8591 operating voltage range of 2.5V-6V
low standby current
via I2C bus serial input / output
PCF8591 by 3 hardware address pins addressing
PCF8591 I2C bus speed sampling rate decision
4 analog inputs programmable as single-ended or differential input
automatic incremental channel selection
PCF8591 analog voltage range from VSS to VDD
PCF8591 built-track and hold circuit
8-bit successive approximation A / D converter
DAC gain realized by an analog output
Module Interface Description
This module left and right, respectively, two-way pin external expansion interfaces, respectively, as follows:
DA output interface chip on the left AOUT
AINO chip analog input interface 0
AIN1 chip analog input interface 1
AIN2 chip analog input interface 2
AIN3 chip analog input interface 3
The right of the SCL IIC clock interface connected microcontroller IO port
SDA IIC digital interface connected to the microcontroller IO port
GND module to an external ground
VCC Power Interface External 3.3v-5v
Module shorting cap instructions
Module 3 short cap respectively function as follows:
P4: connect to P4 short circuit cap, choose the access circuit thermistor
P5: connect to P5 short circuit cap, select photoresistor access circuit
P6: connect to P6 shorting cap, select 0-5V adjustable voltage access circuit
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