A central analog bias block connects to many of the amplifiers, drivers, and regulators. This block is enabled when any of its connected blocks are enabled. Similarly, an internal 8-MHz oscillator is enabled when the boost converter or photo input amplifier is enabled. Table 8-2 lists the conditions when the bias block and 8-MHz oscillator are enabled. The bias block and 8-MHz oscillator consume current in addition to the connecting blocks whenever they are enabled. Because the specified current consumption of each block does not include the bias block or the 8-MHz oscillator, add the bias block and 8-MHz oscillator currents when calculating system power consumption. Typical values of the bias block and 8-MHz oscillator current are shown in Section 6.12.