Integrated Circuits Inc. aPR33DB-C2.1 aPR33DB-C2.1 (Fixed 1/ 2/ 4/ 8 Message mode) Demo Board User Guide aPR33DB-C2.1 is suitable for aPR33A1 / aPR33A2 / aPR33A3, 3 chips with supporting Fixed 1/2/4/8 message, 4 modes. ■ aPR33DB –C2.1 Function： ： PCB size : 51 x 39 mm ◆ RECORDING VOICE MESSAGE : SLIDE SW to REC → Press and hold TACT SW(M0), 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(M0) to play voice with LED on. After play finished, LED will off. Ver 2 1/4 02 / 26 / 2013 Integrated Circuits Inc. aPR33DB-C2.1 Depends on different IC, 1/2/4/8 message modes can have different recording duration per message as below table： The initial setting is 8 message mode.User can define 1/2/4/8 message mode by setting MSEL0 and MSEL1 pin as below： ● 8-Message Mode ● ●2-Message Mode 4-Message Mode ●1-Message Mode If needs Line- In circuit application, please visit http://www.aplusinc.com.tw for datasheet. Ver 2 2/4 02 / 26 / 2013 Integrated Circuits Inc. aPR33DB-C2.1 VOICE OUTPUT The aPR33DB 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. Ver 2 3/4 02 / 26 / 2013 Integrated Circuits Inc. aPR33DB-C2.1 Ver. 2 Add “DAC” application. Ver. 1 Original version aPR33DB-C1.0 User Guide Ver 2 4/4 02 / 26 / 2013