The I2C interface on DACx0502 provides a slave address selection pin A0 in addition to the standard SCL and SDA signals. The A0 can be configured to provide four slave addresses, as specified in Table 3. Pull up the SCL and SDA pins, as shown in Figure 76. The pullup resistor must be selected considering the parasitic capacitance of the I2C bus on the printed circuit board (PCB). A small resistance provides better speed, but at the cost of increased power consumption.