| Features |
- Programmable speech synthesizer
- Wide operating voltage range: 2.4 to 5.5 volts
- 4-bit ADPCM synthesis method
- Provides 4 direct trigger inputs that can easily be extended to 8 or 12 matrix trigger inputs
- Two trigger input debounce times (20 to 40 mS or 160 to 320 µS) can be set
- Provides up to 2 LEDs and 3 STOP outputs
- Every LED pin can drive 3 LEDs simultaneously
- LED flash frequency: 3 Hz
- AUD output current: 5 mA
- Flexible functions programmable through the following:
- LD (load), JP (jump) commands
- Four registers: R0, EN, STOP, and MODE
- Conditional instructions
- Speech equation
- END instruction
- Global repeat (GR) setting
- Output frequency and LED flash type setting
- Programmable power-on initialization (POI) (can be interrupted by trigger inputs)
- POI delay time of 160 mS ensures stable voltage when chip is powered on
- Can be programmed for the following functions:
- Interrupt or non-interrupt for rising or falling edge of each trigger pin (this feature determines retriggerable, non-retriggerable, overwrite, and non-overwrite features of each trigger pin)
- Four playing modes:
- One Shot (OS)
- Level Hold (LH)
- Single-cycle level hold (S_LH)
- Complete-cycle level hold (C_LH)
- Stop output signal setting
- Serial, direct, or random trigger mode setting
- Four frequency options (4/4.8/6/8 KHz) and LED On/Off control can be set independently in each GO instruction of speech equation
- Independent control of LED1 and LED2
- Total of 256 voice group entries available for programming
- Provides the following mask options:
- LED flash type: synchronous/alternate
- LED1 section-controlled: Yes/No
- LED2: section-controlled/STPC-controlled
- LED volume-controlled: No/Yes
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