Integrated Circuits Inc. aPR33AxDB-C2.1F aPR33AxDB-C2.1F (Fixed 1/ 2/ 4/ 8 Message mode) Demo Board User Guide aPR33AxDB-C2.1F is suitable for aPR33A1 / aPR33A3, 2 chips with supporting Fixed 1/2/4/8 message, 4 modes. ■ aPR33AxDB –C2.1F Function： ： ◆ RECORDING VOICE MESSAGE : SLIDE SW to REC → Press and hold TACT SW(S1~S8), hear BEEP sound with LED on to start REC through Microphone → Release TACT SW, hear BEEP BEEP sound with LED off to complete REC. ◆ PLAY VOICE MESSAGE : SLIDE SW to PLAY → Press and leave TACT SW(S1~S8) to play voice with LED on. After play finished, LED will off. Ver 2 1/3 08 / 01 / 2013 Integrated Circuits Inc. aPR33AxDB-C2.1F Depends on different IC, 1/2/4/8 message modes can have different recording duration per message as below table： VOICE OUTPUT The aPR33AxDB support 2 voice output mode, PWM and DAC. ( Default : PWM ) The PWM mode use VOUT1 and VOUT2 pin to drive speaker. The DAC mode use VOUT2 pin to connect your transistor or amplifier. (A) PWM (B) DAC ◎ For more DAC application, Please visit http://www.aplusinc.com.tw for data sheet. If needs Line- In circuit application, please visit http://www.aplusinc.com.tw for datasheet. Ver 2 2/3 08 / 01 / 2013 Integrated Circuits Inc. aPR33AxDB-C2.1F Ver. 2 Remove 4 application circuits. Ver. 1 Original version aPR33AxDB-C2.1F User Guide Ver 2 3/3 08 / 01 / 2013