【正文】
suggested uses flows rapidly pany39。s MP3series general development board and the BSP60 development board, its acoustic fidelity, the recording length, the easy to operate and the price and so on have the superiority, is longest may achieve for several dozens hours the sound recordings. (These two developments board detailed introduction sees this handbook thread). Fourth, looked the request the pronunciation returns puts the acoustic fidelity: The general pronunciation returns puts, the ISD/APR monolithic pronunciation recording and sending out electric circuit and the OTP/MASK chip should all be able to be petent. But regarding some acoustic fidelity request specially high situation, for instance the design medicine model heart and lungs system, the request clearly returns felt relieved, the lung normal sound, the unusual sound, the general pronunciation chip acoustic fidelity could not achieve the design effect, should use the MP3 general development board. Fifth, in the basis product design has the monolithic integrated circuit: If has the monolithic integrated circuit, the above introduced the chip basically all may use. If does not have, then only could in the OTP chip and ISD1810, 1,110, 1,420, 2,560, in APR9301, 9600 and the APR6000 series chip all needs the monolithicinte grated circuit support. Monolithic pronunciation recording and sending out electric circuit ISD1110 (monolithic multistage recording and sending out electric circuit, 10 second / sampling, but key modulation recording and sending out, 5V power supply) ISD1420 (monolithic multistage recording and sending out electric circuit, 20 second / sampling, but key modulation recording and sending out, 5V power supply) ISD1810 (monolithic 816 second may adjust single stage pronunciation recording and sending out electric circuit, the 3V power supply, 16 feet DIP seal) ISD2532/40 (monolithic multistage recording and sending out electric circuit, 32 second /8K, 40 second / sampling, but key modulation recording and sending out, 5V power supply) ISD2560/120 (monolithic multistage recording and sending out electric circuit, 60 second /8K sampling, but key modulation recording and sending out, 5V power supply) ISD3360 (60 second /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control, the3V power supply, the TSOP seal) ISD4002 (2 minute /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control, the 3V power supply) ISD4003 (4 minute /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control, the 3V power supply) ISD4004 (8 minute /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU cont