1.1 External Memory Interface
   llntegrated 8Mbit(or 1MByte) Flash on chip
   lPower efficient using retention technology to avoid floating lines
   lFlexible lO voltage
1.2 Power Management
   lPower On reset control
   llnternal 32K OSC for standby/ shutoff/ sleep state
   lBattery charger (from USB or AC charger) 
   llntegrated all internal voltages from VBAT
   lProvide all LDOs for external components
1.3 User Interface
   lADC serial interface Keypad
1.4 Connectivity
   lUSB 1.1 Device 
   lUART interface 
   l1 SD controller 
   ll2C controller
   ll2S controller
   lGeneral Purpose l/Os
   l1 GPADC, 10bits, 1 channel
1.5 Audio
   l1 channel voice ADC, 8kHz, 13 bits/sample for microphone
   lVoice DAC,8kHz, 13bits/sample for receiver
   lHigh fidelity Stereo DAC, up to 48kHz, 16 bits per sample
   lStereo analog audio line input
1.6 Debug
   lHost debug interface allowing non intrusive in depth investigation
   lGDB debugger
   lExecution logger and profiling through debug port
   lHigh level text based debugging using Host debug or USB
1.7 FM
   llntegrated Broadcast FM tuner which can be tuned world-wide frequency band
1.8 Bluetooth
   llntegrated Bluetooth SoC complaint with 2.1+ EDR standard