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参数资料
| 型号： | AT87251G2D-SLSUM |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | B/16-BIT MICROCONTROLLER WITH SERIAL COMMUNICATION INTERFACES |
| 中文描述： | 16-BIT, OTPROM, 24 MHz, MICROCONTROLLER, PQCC44 |
| 封装： | GREEN, PLASTIC, LCC-44 |
| 文件页数： | 37/76页 |
| 文件大小： | 1175K |
| 代理商： | AT87251G2D-SLSUM |
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37
AT/TSC8x251G2D
4135D–8051–08/05
Table 30.
Summary of Conditional Jump Instructions (2/2)
Notes:
1. A shaded cell denotes an instruction in the C51 Architecture.
2. States are given as jump not-taken/taken.
3. 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.
4. If this instruction addresses an I/O Port (Px, x = 0-3), add 2 to the number of states.
Jump if bitJB <src>, rel(PC)
←
(PC) + size (instr);
IF [src opnd = 1] THEN (PC)
←
(PC) + rel
Jump if not bitJNB <src>, rel(PC)
←
(PC) + size (instr);
IF [src opnd = 0] THEN (PC)
←
(PC) + rel
Jump if bit and clearJBC <dest>, rel(PC)
←
(PC) + size (instr);
IF [dest opnd = 1] THEN
dest opnd
←
0
(PC)
←
(PC) + rel
Jump if accumulator is zeroJZ rel(PC)
←
(PC) + size (instr);
IF [(A) = 0] THEN (PC)
←
(PC) + rel
Jump if accumulator is not zeroJNZ rel(PC)
←
(PC) + size (instr);
IF [(A)
≠
0] THEN (PC)
←
(PC) + rel
Compare and jump if not equalCJNE <src1>, <src2>, rel(PC)
←
(PC) + size (instr);
IF [src opnd1 < src opnd2] THEN (CY)
←
1
IF [src opnd1
≥
src opnd2] THEN (CY)
←
0
IF [src opnd1
≠
src opnd2] THEN (PC)
←
(PC) + rel
Decrement and jump if not zeroDJNZ <dest>, rel(PC)
←
(PC) + size (instr); dest opnd
←
dest opnd -1;
IF [
(Z)] THEN (PC)
←
(PC) + rel
Mnemonic <dest>, <src>
(1)
Comments
Binary Mode
(2)
Source Mode
(2)
Bytes
States
Bytes
States
JB
bit51, rel
Jump if direct bit is set
3
2/5
(3)(6)
3
2/5
(3)(6)
bit, rel
Jump if direct bit of 8-bit address
location is set
5
4/7
(3)(6)
4
3/6
(3)(6)
JNB
bit51, rel
Jump if direct bit is not set
3
2/5
(3)(6)
3
2/5
(3)(6)
bit, rel
Jump if direct bit of 8-bit address
location is not set
5
4/7
(3)(6)
4
3/6
(3)
JBC
bit51, rel
Jump if direct bit is set & clear bit
3
4/7
(5)(6)
3
4/7
(5)(6)
bit, rel
Jump if direct bit of 8-bit address
location is set and clear
5
7/10
(5)(
6)
4
6/9
(5)(6)
JZ
rel
Jump if ACC is zero
2
2/5
(6)
2
2/5
(6)
JNZ
rel
Jump if ACC is not zero
2
2/5
(6)
2
2/5
(6)
CJNE
A, dir8, rel
Compare direct address to ACC and
jump if not equal
3
2/5
(3)(6)
3
2/5
(3)(6)
A, #data, rel
Compare immediate to ACC and
jump if not equal
3
2/5
(6)
3
2/5
(6)
Rn, #data, rel
Compare immediate to register and
jump if not equal
3
2/5
(6)
4
3/6
(6)
at Ri, #data, rel
Compare immediate to indirect and
jump if not equal
3
3/6
(6)
4
4/7
(6)
DJNZ
Rn, rel
Decrement register and jump if not
zero
2
2/5
(6)
3
3/6
(6)
dir8, rel
Decrement direct address and jump
if not zero
3
3/6
(4)(6)
3
3/6
(4)(6)
相关PDF资料 |
PDF描述 |
|---|---|
| AT80251G2D | B/16-BIT MICROCONTROLLER WITH SERIAL COMMUNICATION INTERFACES |
| AT80251G2D-3CSUM | B/16-BIT MICROCONTROLLER WITH SERIAL COMMUNICATION INTERFACES |
| AT80251G2D-RLTUL | B/16-BIT MICROCONTROLLER WITH SERIAL COMMUNICATION INTERFACES |
| AT80251G2D-RLTUM | CONNECTORS, INDUSTRIAL; SERIES:97/MS; CONNECTOR TYPE:CIRCULAR; ER 3C 3#8 SKT RECP BOX |
| AT80251G2D-SLSUL | ER 3C 3#8 SKT RECP BOX |
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