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P89021 Datasheet(PDF) 6 Page - Aplus Intergrated Circuits |
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P89021 Datasheet(HTML) 6 Page - Aplus Intergrated Circuits |
6 / 18 page Integrated Circuits Inc. aP89021/010 Ver 4.0 Aug 23, 2010 6 Programmable Options In both Key Trigger Mode and CPU Parallel Trigger Mode, user can select different trigger functions and output signals to be sent out from the pins OUT1, OUT2 and OUT3. Options affect all Voice Group playback are called Whole Chip Options. Options only affect the playback of individual Voice Group are called Group Options. Whole Chip Options • Key or CPU Parallel Trigger Mode. • Ramp-up-down enable or disable: When COUT is used for playback, Ramp-up-down should be enabled. This function eliminates the ‘POP’ noise at the beginning and end of voice playback. When VOUT1 and VOUT2 are used to drive speaker directly, Ramp-up-down should be disabled. Fig. 1 Ramp-up-down Enable Fig.2 Ramp-up-down Disable • Output Options: This option sets up the three output pins OUT1 and OUT2 to send out different signals during voice playback. Four settings are allowed: OUT1 OUT2 OUT3 Option 1 LED2 LED1 BUSY Option 2 STOP LED1 LED2 Option 3 LED1 BUSY STOP Note: Stop plus must be set to enable in order to have STOP plus to come out. The BUSY output is always HIGH during voice playback. Fig. 3 Output waveforms |
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