Integrated Circuits Inc. aPR33AxDBS-C1.1 aPR33AxDBS-C1.1 (CPU Serial Mode) Demo Board User Guide aPR33AxDBS-C1.1 is suitable for aPR33A3, 2 chips supporting CPU serial interface by /BUSY, CE , SI , CLK , SO 5pin. Part no. aPR33A3(680 sec) Function CPU series interface, max 1024 sections. Application Support Mic & Line in circuits. aPR33AxDBS-C1.1 Function： ： PCB Size : 51 x 39 mm ◎ For Line-In circuits & instruction set, Please visit http://www.aplusinc.com.tw for spec. Ver. 6 1/3 JAN 06 2014 Integrated Circuits Inc. aPR33AxDBS-C1.1 VOICE OUTPUT The aPR33AxDBS 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. 6 2/3 JAN 06 2014 Integrated Circuits Inc. aPR33AxDBS-C1.1 Ver. 6 Delete aPR33A1 data. ---------------------------------------------------------------------------------------------------------------------------------Ver. 5 Rename aPR33AxDB-C1.1S to aPR33AxDBS-C1.1 ---------------------------------------------------------------------------------------------------------------------------------Ver. 4 Add “DAC” application [Modify] Modify the file name to aPR33AxDB-C1.1S. Add slide switch and tact switch Modify the name of the pins : CE/CS , SISDI , CLKSCK , SOSDO ---------------------------------------------------------------------------------------------------------------------------------Ver. 3 [Modify] Delete slide switch and tact switch Ver. 2 [Modify] I/O definition from N.C. to /RESERVE ---------------------------------------------------------------------------------------------------------------------------------Ver. 1 Original version aPR33DB-C1.0 User Guide Ver. 6 3/3 JAN 06 2014