参数资料
型号: 78058F
厂商: NEC Corp.
英文描述: common to 78K/0 Series
中文描述: 普通的78K / 0系列
文件页数: 27/129页
文件大小: 644K
代理商: 78058F
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)
相关PDF资料
PDF描述
780001 Common to 78K/0 Series
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相关代理商/技术参数
参数描述
78058FY 制造商:NEC 制造商全称:NEC 功能描述:Common to 78K/0 Series
78059-001 功能描述:集管和线壳 OCTOGONAL NUT RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector
78059-001LF 功能描述:高速/模块连接器 HPC OCTAGON #2-56 MOUNTING NUT RoHS:否 制造商:Molex 系列:iPass 产品类型: 排数: 列数: 位置/触点数量:38 安装角:Right 节距:0.8 mm 安装风格:Plug 端接类型:SMD/SMT 外壳材料:Thermoplastic 触点材料:High Performance Alloy (HPA) 触点电镀:Gold
78059-002 功能描述:高速/模块连接器 HPC OCTAGON #2-56-MOUNTING NUT RoHS:否 制造商:Molex 系列:iPass 产品类型: 排数: 列数: 位置/触点数量:38 安装角:Right 节距:0.8 mm 安装风格:Plug 端接类型:SMD/SMT 外壳材料:Thermoplastic 触点材料:High Performance Alloy (HPA) 触点电镀:Gold
78059-002LF 功能描述:高速/模块连接器 HPC OCTAGON #2-56 MOUNTING NUT RoHS:否 制造商:Molex 系列:iPass 产品类型: 排数: 列数: 位置/触点数量:38 安装角:Right 节距:0.8 mm 安装风格:Plug 端接类型:SMD/SMT 外壳材料:Thermoplastic 触点材料:High Performance Alloy (HPA) 触点电镀:Gold