參數(shù)資料
型號: AT87251G2D-3CSUM
廠商: Atmel
文件頁數(shù): 17/77頁
文件大?。?/td> 0K
描述: IC 8051 MCU 32K OTP 24MHZ 40DIP
標(biāo)準(zhǔn)包裝: 216
系列: 8x251
核心處理器: C251
芯體尺寸: 8/16-位
速度: 24MHz
連通性: EBI/EMI,I²C,Microwire,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: OTP
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
24
AT/TSC8x251G2D
4135F–8051–11/06
Size and Execution Time
for Instruction Families
Table 20.
Summary of Add and Subtract Instructions
Notes: 1. A shaded cell denotes an instruction in the C51 Architecture.
2. If this instruction addresses an I/O Port (Px, x = 0-3), add 1 to the number of states.
Add 2 if it addresses a Peripheral SFR.
3. If this instruction addresses external memory location, add N+2 to the number of
states (N: number of wait states).
AddADD <dest>, <src>dest opnd
← dest opnd + src opnd
SubtractSUB <dest>, <src>dest opnd
← dest opnd - src opnd
Add with CarryADDC <dest>, <src>(A)
← (A) + src opnd + (CY)
Subtract with BorrowSUBB <dest>, <src>(A)
← (A) - src opnd - (CY)
Mnemonic
<dest>,
<src>
(1)
Comments
Binary Mode
Source Mode
Bytes
States
Bytes
States
ADD
A, Rn
Register to ACC
1
2
A, dir8
Direct address to ACC
2
1(2)
21(2)
A, at Ri
Indirect address to ACC
1
2
3
A, #data
Immediate data to ACC
2
1
2
1
ADD/SUB
Rmd, Rms
Byte register to/from byte register
3
2
1
WRjd, WRjs
Word register to/from word register
3
2
DRkd, DRks
Dword register to/from dword register
3
5
2
4
Rm, #data
Immediate 8-bit data to/from byte
register
4
332
WRj, #data16
Immediate 16-bit data to/from word
register
5
443
DRk,
#0data16
16-bit unsigned immediate data
to/from dword register
5
645
Rm, dir8
Direct address (on-chip RAM or SFR)
to/from byte register
43(2)
32(2)
WRj, dir8
Direct address (on-chip RAM or SFR)
to/from word register
4
433
Rm, dir16
Direct address (64K) to/from byte
register
53(3)
42(3)
WRj, dir16
Direct address (64K) to/from word
register
54(4)
43(4)
Rm, at WRj
Indirect address (64K) to/from byte
register
43(3)
32(3)
Rm, at DRk
Indirect address (16M) to/from byte
register
44(3)
33(3)
ADDC/SU
BB
A, Rn
Register to/from ACC with carry
1
2
A, dir8
Direct address (on-chip RAM or SFR)
to/from ACC with carry
21(2)
A, at Ri
Indirect address to/from ACC with
carry
1
223
A, #data
Immediate data to/from ACC with
carry
2
121
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