when i code LDI R0,#H'C0 my HEW will build the data is: F0 00 90 F0 00 C0(but i thinks it must be 60 C0).
and when i code LDI R0, #H'30 my HEW will build the data is correct: 60 30
i readly need use LDI for imm8 with 0xC0 data.
please help me slove this trouble/
LDI loads a signed char or signed short. H'C0 is to big for signed char. So it is coded as signed short and cannot be coded with 60 C0.
Please use LDI R0, #-64
Did you try Franks suggestion LDI R0,#-64 The immediate value is signed H'C0 is 192 which is too big for a signed 8 bit number. It can only range from -128 to +127 by using Franks suggestion of #-64 decimal this encodes to C0 as a signed hex number. The number is twos complement.