Integrated Circuits Inc. aPR33AxDBF-E2.1 aPR33AxDBF-E2.1 (Fixed 1/ 2/ 4/ 8 Message mode) Demo Board User Guide aPR33AxDBF-E2.1 is suitable for aPR33A3, 2 chips with supporting Fixed 1/2/4/8 message, 4 modes. ■ aPR33AxDBF –E2.1 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. 1 1/4 Jan 06 2014 Integrated Circuits Inc. aPR33AxDBF-E2.1 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 Ver. 1 4-Message Mode ●1-Message Mode 2/4 Jan 06 2014 Integrated Circuits Inc. aPR33AxDBF-E2.1 The sample rate can be adjusted by using different values of resistors as below table： ( Default : 12K ) Resistance Sampling Frequency Duration aPR33A3 189K 6K 682 sec 147K 7K 584 sec 115K 8K 512 sec 95K 9K 454 sec 76K 10K 408 sec 60K 11K 372 sec 47K 12K 341 sec VOICE OUTPUT The aPR33AxDBF 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. 1 3/4 Jan 06 2014 Integrated Circuits Inc. aPR33AxDBF-E2.1 Ver.1 Original version aPR33AxDBF-E2.1 User Guide Ver. 1 4/4 Jan 06 2014