Hardware Design - Rainbow Technologies

SIM300DZ Hardware DesignGNDDigital groundPower on or power offPIN NAME I/O DESCRIPTIONPWRKEY I Voltage input for power on key. Press VILmax=0.2*VBATthe key , the PWRKEY get a low VIHmin=0.6*VBATlevel voltage for user to power on or VImax=VBATpower off the system, the usershould keep pressing the key for amoment when power on or power offthe system. Because the system needmargin time assert the software.Audio interfacesPIN NAME I/O DESCRIPTIONMIC1PMIC1NI Positive and negative voiceband input Audio DC Characteristicsrefer to chapter 3.10MIC2PI Auxiliary positive and negativeMIC2Nvoiceband inputSPK1PO Positive and negative voicebandSPK1NoutputSPK2PO Auxiliary positive and negativeSPK2Nvoiceband outputAGNDAnalog groundGERNERAL PURPOSE input/outputPIN NAME I/O DESCRIPTIONSTATUS O Indicate work statusVILmin=0VGPO1 O Normal Output PortVILmax=0.3 *VDD_EXTVIHmin=0.7*VDD_EXTDISP_DATAI/O Display interfaceVIHmax= VDD_EXT+0.3DISP _CLKOVOLmin=GNDDISP _CSOVOLmax=0.2VDISP _D/COVOHmin= VDD_EXT-0.2DISP _RSTOVOHmax= VDD_EXTKBR0ISerial interfacePIN NAME I/O DESCRIPTIONRXD I Receive dataVILmin=0VDTR I Data terminal ReadyVILmax=0.3*VDD_EXTTXD O Transmit dataVIHmin=0.7*VDD_EXTRTS I Request to sendVIHmax= VDD_EXT+0.3SIM300DZ_HD_V2.03 1510.01.2007