STA321 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STA321' PDF : 157 Pages View PDF
STA321
FFX
7.6
Headphone modulation
The FFX modulator can be used for driving a headphone load with the common terminal
available, together with left and right terminals.
In this case it is possible to drive the common terminal with a 50% fixed duty cycle square
wave coming from output B of the modulator, by setting bit HALFB_n to 1, and the left and
right terminals from the output A of two different channels. For the three outputs used in this
way bits PM_nA and PM_nB can be 00 or 01.
Figure 34. Modulation for headphones
Left
Common
Right
Output 0A
Left
Output 0B
Output 1A
Common
Right
Doc ID 15351 Rev 3
57/157
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