A certain 12 bit ADC has an FSD span of 0 to 5.0 volts. An analogue input of 3.142 volts is converted to O 275010 O 2573.30 O AOD16 O 1010000111012

What is the purpose of circuit 1 and 2 (highlighted)? How they work? Figure 13. Basic structure of a standard /O port bit Circuit 2 To on-chip peripheral Analog Input Altornate Function Input onvoff I Circuit 1 onlotf Read Voo TTL Schmitt trigger Protection diode on/off Input driver vo pin Write TOutput driver Voo A Protection diode P-MOS Output control Ves N-MOS Readwrite From on-chip peripheral Vss Push-pul, open-drain or deabled Circuit 2 Alternate Function Output ai14781 Bit setireset registers Output data register Input data register SK KH