DB I.MX21 17X17 PB-FR-Core: Number of cores (SPEC)-SRAM (kB)Support external memory Serial Communication-I2S-CAN-Serial Audio Interface (SAI)-EthernetGPIOUSB ControllersTimer (bits)-PWM-ADC [Number , bits]Supply Voltage [Min to Max] (V) Ambient Operating Temperature (Min to Max) (℃)