1. I2C and DAC Interfacing and Programming
Chapter9
I2C and DAC Interfacing and Programming

2. I2C Bus Characteristics

3. I2C Bit Format

4. START and STOP Conditions in I2C

5. Serial data Communication Comparison

6. DAC Block Diagram

7. Microcontroller Connection to DAC0808

8. MCP4725 DAC Block Diagram

9. I2C Connection to MCP4725 DAC in EduPad

10. Saw Tooth WaveForm

11. Angle vs. Voltage Magnitude for Sine Wave
(degrees)
Sin Ɵ
VOUT (Voltage Magnitude)
1. 65V + (1. 65V × sin Ɵ)
Values Sent to DAC (decimal)
(Voltage Mag. × 310)
1.65
2048 30
0.5
2.475
3071 60
0.866
3.0789
3821 90
1.0
3.3
4095
120
150
180
210
-0.5
0.825
1024
240
-0.866
0.2211
274
270
-1.0
300
330
360

12. Angle vs. Voltage Magnitude for Sine Wave (for 3V)