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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT84192 데이터시트(PDF) 12 Page - Holtek Semiconductor Inc |
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HT84192 데이터시트(HTML) 12 Page - Holtek Semiconductor Inc |
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12 / 31 page  HT84XXX 12 April 26, 2000 The capability of the voice sampling rate for various voice compression format. fOSC PCM8 m-law PCM AD4 4M 12kHz 11kHz 8kHz 5M 15kHz 14kHz 10kHz 6M 18kHz 16kHz 12kHz 8M 24kHz 22kHz 16kHz Oscillator configuration The HT84XXX series provides an RC oscillator for the system clock. The system oscillator stops in the standby state so as to reduce power consumption. For the oscillator circuit, an external resistor is required between OSC and VSS. The oscillator frequency is typically 4MHz for an external re- sistor of 240kW. The RC type of oscillator offers the most cost-effective solution, although the frequency of the oscillation may vary with tem- perature and the chip itself due to process vari- ation. ROSC fOSC HT84EVA HT84P00 IC 4M 180kW 240kW 240kW 5M 150kW 210kW 210kW 6M 120kW 180kW 180kW 8M 91kW 150kW 150kW Mask options The following options have to be defined to en- sure a proper system functioning: · Pull-high resistor: 33kW/98kW (3V) · Keydebouncetime:0ms~255ms(fOSC=4MHz) |
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