●Standard CMOS process.
●Embedded 512K bits EPROM.
●21sec Voice Length at 6KHz sampling and 4-bit ADPCM compression.
●Maximum 12 voice groups.
●Combination of voice blocks to extend playback duration.
●960 table entries are available for voice block combinations.
●User selectable PCM or ADPCM data compression.
●Two triggering modes are available (EPROM programmable options).
◆Key Trigger Mode ◆CPU Parallel Trigger Mode
●Voice Group Trigger Options: Edge/Level; Hold/Un-hold; Retrigger/Non-retrigger.
●Whole Chip Options: Ramp / No-ramp; Output Options; Key / CPU trigger mode.
●RST pin set to HIGH to stop playback at once.
●Two user programmable outputs for STOP pulse, BUSY signal and flashing LED.
●Built-in oscillator to control sampling frequency with an external resistor.
●2.6V – 5.0V; Wide range single power supply and < 5uA low stand-by current.
●PWM Vout1 and Vout2 drive speaker directly.
●D/A COUT to drive speaker through an external BJT.
●Development System support voice compilation and options selection.
aP8921A series high performance Voice OTP is fabricated with Standard CMOS process with embedded 512K bits EPROM. It can store up to 21sec voice message with 4-bit ADPCM compression at 6KHz sampling rate. 8-bit PCM is also available as user selectable option. Two trigger modes, simple Key trigger mode and Parallel CPU trigger mode facilitate different user interface. 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. PC controlled programmer and developing software are available.