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STA321 데이터시트(PDF) 57 Page - STMicroelectronics

부품명 STA321
상세설명  4-channel digital audio system with FFX??driver
PDF  157 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA321 데이터시트(HTML) 57 Page - STMicroelectronics

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STA321
FFX
Doc ID 15351 Rev 3
57/157
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
Right
Common
Output 0B
Output 0A
Output 1A
Common
Left
Right



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