參數(shù)資料
型號: μPD789418
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 68/125頁
文件大?。?/td> 366K
代理商: ΜPD789418
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
51
ADDC
Add with Carry
Addition of Byte Data with Carry
[Instruction format]
ADDC dst,src
[Operation]
dst,CY
dst + src + CY
[Operand]
Mnemonic
Operand (dst,src)
Mnemonic
Operand (dst,src)
ADDC
A,#byte
ADDC
A,!addr16
saddr,#byte
A,[HL]
A,r
A,[HL + byte]
A,saddr
[Flag]
Z
AC
CY
×
×
×
[Description]
The destination operand (dst) specified with the 1st operand, the source operand (src) specified with the 2nd
operand and the CY flag are added and the result is stored in the destination operand (dst) and the CY flag.
The CY flag is added to the least significant bit. This instruction is mainly used to add two or more bytes.
If the addition result shows that dst is 0, the Z flag is set to (1). In all other cases, the Z flag is cleared to (0).
If the addition generates a carry out of bit 7, the CY flag is set to (1). In all other cases, the CY flag is cleared
to (0).
If the addition generates a carry for bit 4 out of bit 3, the AC flag is set to (1). In all other cases, the AC flag is
cleared to (0).
[Description example]
ADDC A,[HL];
The A register contents and the contents at address (HL register) and the CY flag are added
and the result is stored in the A register.
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