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參數資料
型號: 780206
廠商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件頁數: 20/129頁
文件大小: 644K
代理商: 780206
20
User's Manual U12326EJ4V0UM
CHAPTER 3 ADDRESSING
3.1 Instruction Address Addressing
An instruction address is determined by program counter (PC) contents. The PC contents are normally
incremented (+1 for each byte) automatically according to the number of bytes of an instruction to be fetched each
time another instruction is executed. When a branch instruction is executed, the branch destination information
is set to the PC and branched by the following addressing (for details of each instruction, refer to
CHAPTER 5
EXPLANATION OF INSTRUCTIONS
).
3.1.1 Relative addressing
[Function]
The value obtained by adding 8-bit immediate data (displacement value: jdisp8) of an instruction code to
the start address of the following instruction is transferred to the program counter (PC) and branched. The
displacement value is treated as signed two’s complement data (–128 to +127) and bit 7 becomes a sign
bit. In other words, in relative addressing, the value is relatively transferred to the range between –128 and
+127 from the start address of the following instruction.
This function is carried out when the “BR $addr16” instruction or a conditional branch instruction is executed.
[Illustration]
15
0
PC
15
0
S
15
0
PC
+
8
7
6
α
jdisp8
When S = 0,
α
indicates all bits "0".
When S = 1,
α
indicates all bits "1".
... PC is the start address of
the next instruction of
a BR instruction.
相關PDF資料
PDF描述
78P0914 Common to 78K/0 Series
780208 Common to 78K/0 Series
780228 Common to 78K/0 Series
780308 Common to 78K/0 Series
780308Y Common to 78K/0 Series
相關代理商/技術參數
參數描述
78-0206 制造商:Ideal Industries Inc 功能描述:P3 2" POWER BIT, 1 PER CARD
78-0207 制造商:Ideal Industries Inc 功能描述:BT,PWR BIT,QR EXT 3",1 PERCARD
780208 制造商:NEC 制造商全稱:NEC 功能描述:Common to 78K/0 Series
78-0208-5 制造商:Ideal Industries Inc 功能描述:PWR BIT,QUICK-CHANGE EXT,6"-5
780-20C-10K 制造商:VRN 功能描述:780-20C-10K
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