参数资料
型号: 780001
厂商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件页数: 20/129页
文件大小: 644K
代理商: 780001
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.
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相关代理商/技术参数
参数描述
780-001 制造商:EDDING 功能描述:BLACK EXTRAFINE PAINT PEN
780001 BK001 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLK 1000'
780001 BK002 制造商:ALPHA DEARBORN 功能描述:Wire, Hook-Up; 1/0 AWG; 1045/30; 0.082 in.; 0.589 in.; 600 V; Black
780001 BK005 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLACK 100' 制造商:Belden Inc 功能描述:780001 BLACK 100 FT
780001 BL001 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLUE 1000'