СК
Size: a a a
I
I
СК
I
СК
СК
СК
ИМ
ИМ
СК
СК
СЗ
AP
'123' is a multi byte character constant. Also its an int.
On arduino the int is 2 bytes, so the longest multibyte char can be two characters wide. '123' is truncated from 32 bits to 16.
Consider a list of values ( on 8 bit AVR )
'a' == 0x61
'aa' == 0x6161
'aaa' == 0x6161
'aaaa' == 0x6161
'aaaaa' == 0x6161
СЗ