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STA321 Datasheet(PDF) 59 Page - STMicroelectronics

Part # STA321
Description  4-channel digital audio system with FFX??driver
PDF  157 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA321 Datasheet(HTML) 59 Page - STMicroelectronics

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STA321
FFX
Doc ID 15351 Rev 3
59/157
7.8
PWM00 output
Pin PWM00 is an additional output with a maximum driving capability of 2 mA to control an
external bridge or external operational amplifier.
By default, PWM00 is tied to logical 0. When register bit CKOCFG[0] is set to 1 then any
FFX PWM channel output can be mapped to it.
When the CMOS bridge is in standby the output PWM00 is, by default, turned off. However,
it is possible to have the FFX signal PWM3A as the PWM00 output by using bit 3 of register
FFXCFG0 on page 82, and this whatever the status of power-down or the 3-state signals of
both bridges, even if they are different from the normal operating mode where the output is 0
when in power-down or 3-state mode.



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