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STA350B датащи(PDF) 85 Page - STMicroelectronics |
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STA350B датащи(HTML) 85 Page - STMicroelectronics |
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85 / 94 page ![]() DocID018572 Rev 7 85/94 STA350B, STA350BW Register description 94 8.24.4 Channel PWM enable (CPWMEN) bit (address 0x4B, bit D2) This bit, when set, activates a mute output in case the volume will reach a value lower than -76 dBFS. 8.24.5 Power-down delay selector (PNDLSL[2:0]) bits (address 0x4C, bit D4, D3, D2) As per Section 8.24.3, the assertion of PWDN activates a counter that, by default, after 13 million clock cycles puts the power bridge in tri-state mode, independently from the fadeout time. Using these registers it is possible to program this counter according to the following table: PNDLSL[2] PNDLSL[1] PNDLSL[2] Fade out time 0 0 0 Default time (13 M clock cycles) 0 0 1 Default time divided by 2 0 1 0 Default time divided by 4 0 1 1 Default time divided by 8 1 0 0 Default time divided by 16 1 0 1 Default time divided by 32 1 1 0 Default time divided by 64 1 1 1 Default time divided by 128 |
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