Electrical.h

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#ifndef ATMEGA2560_DEFINITIONS_ELECTRICAL_H
#define ATMEGA2560_DEFINITIONS_ELECTRICAL_H
 
#include <stdint.h>
#include "Config.h"

namespace atmega2560
{
    namespace electrical
    {
        enum class Grade : uint8_t
        {
            Unspecified = 0, 
            Standard = 1,    
            LowVoltageV = 2, 
        };

        namespace standard
        {
            enum : int16_t
            {
                operating_temperature_min_c = -40, 
                operating_temperature_max_c = 85,  
            };
            enum : uint32_t
            {
                available = 1,                     
                recommended_vcc_min_mv = 4500,     
                recommended_vcc_max_mv = 5500,     
                max_cpu_frequency_hz = 16000000UL, 
            };
        }

        namespace low_voltage
        {
            enum : int16_t
            {
                operating_temperature_min_c = -40, 
                operating_temperature_max_c = 85,  
            };
            enum : uint32_t
            {
                available = 1,                           
                recommended_vcc_min_mv = 1800,           
                recommended_vcc_max_mv = 5500,           
                max_cpu_frequency_hz_at_1v8 = 2000000UL, 
                max_cpu_frequency_hz_at_2v7 = 8000000UL, 
            };
        }

        namespace absolute_maximum
        {
            enum : int16_t
            {
                operating_temperature_min_c = -55,    
                operating_temperature_max_c = 125,    
                storage_temperature_min_c = -65,      
                storage_temperature_max_c = 150,      
                min_pin_voltage_mv = -500,            
                max_pin_voltage_above_vcc_mv = 500,   
                min_reset_voltage_mv = -500,          
                max_reset_voltage_mv = 13000,         
                max_vcc_mv = 6000,                    
                max_dc_current_per_io_pin_ma = 40,    
                max_dc_current_vcc_gnd_pins_ma = 200, 
            };
        }

        namespace unspecified
        {
            enum : uint32_t
            {
                available = 0,              
                recommended_vcc_min_mv = 0, 
                recommended_vcc_max_mv = 0, 
            };
        }
 
#if defined(MCU_GRADE_INDUSTRIAL_85C)
        namespace selected = standard;
        static const Grade selected_grade = Grade::Standard;
#elif defined(MCU_GRADE_LOW_VOLTAGE)
        namespace selected = low_voltage;
        static const Grade selected_grade = Grade::LowVoltageV;
#else
        namespace selected = unspecified;
        static const Grade selected_grade = Grade::Unspecified;
#endif
    }
}
 
#endif