What is the main purpose of Binary Coded Decimal (BCD) in embedded systems?, To store decimal digits in separate 4-bit binary blocks , To convert all numbers directly into pure binary, To reduce the size of memory usage compared to binary, To automatically control LEDs without code, In Packed BCD, how are two decimal digits stored?, Each digit in its own byte, upper 4 bits empty, As a decimal number in pure binary, One digit in upper 4 bits, one in lower 4 bits , They are stored as ASCII characters, Why must BCD values never exceed 9 in a 4-bit group?, Because the microcontroller cannot process binary, Because the display cannot show numbers above 9, Because values above 9 are illegal and will cause the display to glitch , Because it will automatically convert to hexadecimal.

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