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SD6830 Datasheet(PDF) 20 Page - AUK corp |
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SD6830 Datasheet(HTML) 20 Page - AUK corp |
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20 / 34 page  KSI-W002-000 20 9.3 Instruction Descriptions ADD n Binary code : 0110xxxx Syntax : [<label>] ADD n Operation : (A) ← (A) + n, n=0~15 ( n must be decimal number ) Flags : CY: Unaffected. SF: Set to one if carry occurs, cleared otherwise. Words/Cycles : 1/1 Description : Adds an immediate data to the accumulator and stores the result in the accumulate. Example : ADD 8 ; Add 8 to A. JMP 035 ; Jump to 035 if 0≤A≤7 JMP 05F ; Jump to 05F if 8≤A≤15 ADDC @HL Binary code 00010000 Syntax : [<label>] ADDC @HL Operation : (A) ← (A) + M[(HL)] + (CY), (CY) ← Carry Flags : CY: Set on carry-out of (A) + M[(HL)] + (CY) SF: Unaffected Words/Cycles : 1/1 Description : Adds the contents of the accumulator, the contents of data memory addressed by registers H and L, and the carry bit. It stores the result in the accumulator and the carry flag. Example : CLRB CY ; Clear CY to zero LDA 5 ; Load 5 to A CLRB H ; Clear H to zero LDL 6 ; Load 6 to L ADDC @HL ; Add the content of A, M[(06)], and the content of CY CAL addr Binary code : 11xxxxxx Syntax : [<label>] CAL addr Operation : (SK1) ← (SK0), (SK0) ← (PC) + 1, (PCL) ← addr, addr = 000 ~ 03F ( addr must be hexadecimal number ) Flags : CY: Unaffected SF: Unaffected Words/Cycles : 1/1 Description : Calls a subroutine located at the indicated address and pushes the current contents of the program counter to the top of stack. The indicated address must be within the current page. Example : CAL 100 : Call subroutine located at the 100. The 100 must be logical address and within the current page. SD6830 |
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