down boxes. Zero-Crossing Detection and Debounce

Delay are also controlled through the interface. For a

detailed description of zero-crossing detection and

debounce delay, refer to the MAX9850 data sheet.

Clicking the Force Headphone Mono Mode checkbox

mutes the right channel and outputs a left/right-channel

mix on the left channel.

Power Management

Power-management features of the MAX9850 are

accessed through the Power tab (Figure 4).

Power enables for the MCLK input, charge pump, line

out, line in, DAC input, and headphone output are

accessed through the Power Management box.

The MAX9850 charge pump can operate either an

internal 666.7kHz oscillator or frequency derived from

the master clock. Force the MAX9850 to use the inter-

nal oscillator by checking the Use Internal Oscillator

checkbox. When the Use Internal Oscillator checkbox

is unchecked, set the charge-pump clock divider by

adjusting the Clock Division Ratio slider. Refer to the

MAX9850 Evaluation System/Evaluation Kit

6

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Figure 4. MAX9850 EV Kit Software Power Tab