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參數(shù)資料
型號: 780001
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(shù): 27/129頁
文件大小: 644K
代理商: 780001
27
CHAPTER 3 ADDRESSING
User's Manual U12326EJ4V0UM
15
0
Short direct memory
Effective
address
1
1
1
1
1
1
1
8
7
0
7
OP code
saddr-offset
α
When 8-bit immediate data is 20H to FFH,
α
= 0.
When 8-bit immediate data is 00H to 1FH,
α
= 1.
3.2.4 Short direct addressing
[Function]
The memory to be manipulated in the fixed space is directly addressed with 8-bit data in an instruction word.
This addressing is applied to the 256-byte fixed space FE20H to FF1FH. An internal high-speed RAM and
special function registers (SFRs) are mapped at FE20H to FEFFH and FF00H to FF1FH, respectively.
The SFR area (FF00H to FF1FH) where short direct addressing is applied is a part of the entire SFR area.
Ports that are frequently accessed in a program, a compare register of the timer/event counter and a capture
register of the timer/event counter are mapped in the area FF00H through FF1FH, and these SFRs can be
manipulated with a small number of bytes and clocks.
When 8-bit immediate data is at 20H to FFH, bit 8 of an effective address is set to 0. When it is at 00H to
1FH, bit 8 is set to 1. See
[Illustration]
below.
[Operand format]
Identifier
Description
saddr
Label or FE20H to FF1FH immediate data
saddrp
Label or FE20H to FF1FH immediate data (even address only)
[Description example]
MOV FE30H, #50H; When setting saddr to FE30H and the immediate data to 50H
[Illustration]
Instruction code
0
0
0
1
0
0
0
1
OP code
0
0
1
1
0
0
0
0
30H (saddr-offset)
0
1
0
1
0
0
0
0
50H (immediate data)
相關(guān)PDF資料
PDF描述
780018Y Common to 78K/0 Series
780024 Common to 78K/0 Series
780024Y Common to 78K/0 Series
780034 TL Series Toggle Switch, 1 pole, 3 position, Screw terminal, Locking Lever, Military Part Number MS24658-27N
780034Y Common to 78K/0 Series
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)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'
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