As the Figure below indicates, there are two max voltages for the DSP Core (CVDD) and peripherals (DVDD).  Input (Vi) and Output (Vo) voltages are provided to show the maximum voltages that can be applied to any hardware pin.  Temperature ranges are also included to define Operating Temperatures (Tc) and storage temperatures (Tstg)

absolute maximum ratings over operating case temperature ranges (unless otherwise noted)†
Supply voltage range, CVDD (see Note 1) .....................................− 0.3 V to 1.8 V
Supply voltage range, DVDD (see Note 1) ......................................−0.3 V to 4 V
Input voltage range ..............................................................................−0.3 V to 4 V
Output voltage range ...........................................................................−0.3 V to 4 V
Operating case temperature ranges, Tc (default) :............................0 C to 90 C
                                                                  (A version):....................C6203BGNZA-250 −40 C to105 C
Storage temperature range, Tstg .......................................................−65 C to 150 C
Temperature cycle range, (1000-cycle performance)...................... −40 C to 125 C

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to VSS.