| Description | HT86XXX 8-Bit Voice Synthesizer MCU Features · Operating voltage: 2.4V~5.2V · Build-in low supply voltage detection circuit (2.2V or 3.3V) · System clock: 4MHz~8MHz · Crystal or RC oscillator for system clock · 24 I/O pins with 4 shared pins included · 8K´16-bit program ROM · 208´8-bit RAM · One ex... |
| Features |
· Operating voltage: 2.4V~5.2V · Build-in low supply voltage detection circuit (2.2V or 3.3V) · System clock: 4MHz~8MHz · Crystal or RC oscillator for system clock · 24 I/O pins with 4 shared pins included · 8K´16-bit program ROM · 208´8-bit RAM · One external interrupt input · Three 16-bit programmable timer counter and over- flow interrupts · 12-bit high quality D/A output by transistor or HT82V733 · Built-in voice ROM in various capacity · One optional 32768Hz crystal oscillator for RTC time base (8-bit counter with 3-bit prescaler) · Watchdog Timer · 8-level subroutine nesting · HALT func... |
| Datasheet |
 HT86576 Datasheet - 184.33KB |
| Part Number | Description |
|---|---|
 Holtek Semiconductor |
Talking Back The HT8656 is a single chip CMOS LSI for talking back applications using an ADM algorithm. Functions of the IC consist of recording/playing as well as auto power off. It starts recording when a sound input is detected, and stops to play back when silence lasts 0.5 seconds during recording. The auto power off function is activated once a REC/PLAY cycle has been implemented 64 times or an interval of silence exceeds 2 minutes. The HT8656 provides a recording capacity of 2 seconds for DRAM of 64K and 8 seconds for DRAM of 256K at a 32Kb sampling rate and double recording capacity at a 16Kb sampling rate. A higher sampling rate will result in sounds of better quality but sacrifice the recording ... |
Holtek Semiconductor |
(HT8658 / HT8659) Voice Recorder The HT8658/HT8659 are single chip CMOS LSIs using an ADM coding technology. They are designed for applications on recording sounds. The HT8658 and HT8659 have almost the same functions apart from the reset time. The reset time of the HT8658 has to be over 4 seconds but of the HT8659 over 2 seconds. Blocks within each chip include a DRAM interface circuit, signal amplifier, 8 bit ADC and internal low pass filter. Encoded data are stored in external DRAMs and played back after the PLYB pin be triggered. Each IC provides four kinds of sampling rate to be selected, namely 32K/22K/16K/11K bps (bits per second). A higher sampling rate results in sounds of better quality but sacrifices the recordin... |
Holtek Semiconductor |
(HT8658 / HT8659) Voice Recorder The HT8658/HT8659 are single chip CMOS LSIs using an ADM coding technology. They are designed for applications on recording sounds. The HT8658 and HT8659 have almost the same functions apart from the reset time. The reset time of the HT8658 has to be over 4 seconds but of the HT8659 over 2 seconds. Blocks within each chip include a DRAM interface circuit, signal amplifier, 8 bit ADC and internal low pass filter. Encoded data are stored in external DRAMs and played back after the PLYB pin be triggered. Each IC provides four kinds of sampling rate to be selected, namely 32K/22K/16K/11K bps (bits per second). A higher sampling rate results in sounds of better quality but sacrifices the recordin... |