Electrical.h

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#ifndef ATMEGA328P_DEFINITIONS_ELECTRICAL_H
#define ATMEGA328P_DEFINITIONS_ELECTRICAL_H
 
#include <stdint.h>
#include "Config.h"

namespace atmega328p
{
    namespace electrical
    {
        enum class Grade : uint8_t
        {
            Unspecified,    
            Industrial85C,  
            Industrial105C, 
            Automotive125C, 
        };
 
        enum : int16_t
        {
            absolute_temperature_min_c = -55, 
            absolute_temperature_max_c = 125, 
            storage_temperature_min_c = -65,  
            storage_temperature_max_c = 150,  
        };
 
        enum : uint16_t
        {
            absolute_max_voltage_mv = 6000,        
            absolute_max_io_pin_current_ma = 40,   
            absolute_max_vcc_gnd_current_ma = 200, 
            absolute_max_current_per_port_ma = 30, 
            io_test_current_at_5v_ma = 20,         
            io_test_current_at_3v_ma = 10,         
            io_sink_group_max_current_ma = 100,    
            io_source_group_max_current_ma = 150,  
            avcc_max_difference_from_vcc_mv = 300, 
            internal_bandgap_min_mv = 1000,        
            internal_bandgap_typical_mv = 1100,    
            internal_bandgap_max_mv = 1200,        
            io_pullup_min_kohm = 20,               
            io_pullup_max_kohm = 50,               
            reset_pullup_min_kohm = 30,            
            reset_pullup_max_kohm = 60,            
        };
 
        enum : uint8_t
        {
            absolute_max_current_is_not_a_design_target = 1, 
        };

        namespace industrial_85c
        {
            enum : uint8_t
            {
                available = 1, 
            };
            enum : uint16_t
            {
                min_voltage_mv = 1800, 
                max_voltage_mv = 5500, 
            };
            enum : int16_t
            {
                min_temperature_c = -40, 
                max_temperature_c = 85,  
            };
            enum : uint32_t
            {
                max_clock_hz_at_1v8 = 4000000UL,  
                max_clock_hz_at_2v7 = 10000000UL, 
                max_clock_hz_at_4v5 = 20000000UL, 
            };
        }

        namespace industrial_105c
        {
            enum : uint8_t
            {
                available = 1, 
            };
            enum : uint16_t
            {
                min_voltage_mv = 1800, 
                max_voltage_mv = 5500, 
            };
            enum : int16_t
            {
                min_temperature_c = -40, 
                max_temperature_c = 105, 
            };
            enum : uint32_t
            {
                max_clock_hz_at_1v8 = 4000000UL,  
                max_clock_hz_at_2v7 = 10000000UL, 
                max_clock_hz_at_4v5 = 20000000UL, 
            };
        }

        namespace automotive_125c
        {
            enum : uint8_t
            {
                available = 1, 
            };
            enum : uint16_t
            {
                min_voltage_mv = 2700, 
                max_voltage_mv = 5500, 
            };
            enum : int16_t
            {
                min_temperature_c = -40, 
                max_temperature_c = 125, 
            };
            enum : uint32_t
            {
                max_clock_hz_at_2v7 = 8000000UL,  
                max_clock_hz_at_4v5 = 16000000UL, 
            };
        }

        namespace unspecified
        {
            enum : uint8_t
            {
                available = 0, 
            };
            enum : uint16_t
            {
                min_voltage_mv = 0, 
                max_voltage_mv = 0, 
            };
            enum : int16_t
            {
                min_temperature_c = 0, 
                max_temperature_c = 0, 
            };
            enum : uint32_t
            {
                max_clock_hz_at_1v8 = 0, 
                max_clock_hz_at_2v7 = 0, 
                max_clock_hz_at_4v5 = 0, 
            };
        }
 
#if defined(MCU_GRADE_INDUSTRIAL_85C)
        namespace selected = industrial_85c;
        static const Grade selected_grade = Grade::Industrial85C;
#elif defined(MCU_GRADE_INDUSTRIAL_105C)
        namespace selected = industrial_105c;
        static const Grade selected_grade = Grade::Industrial105C;
#elif defined(MCU_GRADE_AUTOMOTIVE_125C)
        namespace selected = automotive_125c;
        static const Grade selected_grade = Grade::Automotive125C;
#else
        namespace selected = unspecified;
        static const Grade selected_grade = Grade::Unspecified;
#endif

        namespace current_group
        {
            enum : uint32_t
            {
                sink_1 = 0x00003F00UL,   
                sink_2 = 0x007000FFUL,   
                sink_3 = 0x000F8000UL,   
                source_1 = 0x000FBF00UL, 
                source_2 = 0x007000FFUL, 
            };
        }
    }
}
 
#endif