FEATURES l Standard CMOS process. l Embedded EPROM. l Embedded 8-bit MCU. l 42sec voice duration at 6 KHz sampling with 4-bit ADPCM compression. l Combination of voice building blocks to extend playback duration. l Table entries are available for voice block combinations. l User selectable PCM or ADPCM data compress. l Voice Group Trigger Options: Edge / Level; Hold / Un-hold; Retrigger / Non-retrigger. l Programmable I/Os, Timer Interrupt and Watch Dog Timer. l Built-in oscillator with fixed Rosc, software control sampling frequency l 2.2V 3.6V single power supply and < 5uA low stand-by current. l PWM Vout1 and Vout2 drive speaker directly. l D/A COUT with ramp-up ramp-down option to drive speaker through an external BJT. DESCRIPTION Aplus aIVR is a 8-bit CPU based Voice chip series. It is fabricated with Standard CMOS process with embedded voice storage memory. It can store from 10 to 341 sec voice message with 4-bit ADPCM compression at 6KHz sampling rate. 8-bit PCM is also available as user selectable option to improve sound quality. Depending on IC body, there are up to twelve programmable I/O pins. Key trigger and Parallel CPU trigger mode can be configured according to different application requirement. User selectable triggering and output signal options provide maximum flexibility to various applications. Built-in resistor controlled oscillator, 8-bit current mode D/A output and PWM direct speaker driving output minimize the number of external components.
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