Integrated Circuits Inc. aPR33DB-C1.0 aPR33DB-C1.0 (CPU Serial Mode) Demo Board User Guide aPR33DB-C1.0 is suitable for aPR33A1/ aPR33A2 / aPR33A3, 3 chips supporting CPU serial interface by /BUSY, CE , SI , CLK , SO 5pin. Part no. aPR33A1(170 sec) aPR33A2(340 sec) aPR33A3(680 sec) Function CPU series interface, max 1024 sections. Application Support Mic & Line in circuits. aPR33DB Function： ： PCB Size : /RESERVE /BUSY CE SI CLK SO N.C. N.C. 51 x 39 mm MIC: Voice Input LED Connect Speaker. Connect Power. (VCC 3 ~ 6.5V) ◎ For Line-In circuits & instruction set, Please visit http://www.aplusinc.com.tw for spec. Ver. 3 1/2 1/3/2013 Integrated Circuits Inc. aPR33DB-C1.0 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. 3 2/2 1/3/2013