參數(shù)資料
型號(hào): HD404324
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位HMCS400系列微電腦(4位單片微計(jì)算機(jī))
文件頁(yè)數(shù): 72/94頁(yè)
文件大?。?/td> 573K
代理商: HD404324
HD404328 Series
72
Addressing Modes
RAM Addressing Modes
The MCU has three RAM addressing modes, as shown in figure 44 and described below.
Register Indirect Addressing Mode:
The contents of the W, X, and Y registers (10 bits in total) are used
as a RAM address.
Direct Addressing Mode:
A direct addressing instruction consists of two words. The first word contains
the opcode, and the contents of the second word (10 bits) are used as a RAM address.
Memory Register Addressing Mode:
The memory registers (MR), which consist of 16 digits from $040–
$04F, are accessed with the LAMR and XMRA instructions.
1st word of instruction
2nd word of instruction
Direct Addressing
RAM address
Memory Register Addressing
Instruction
0
0
1
0
0
0
Register Indirect Addressing
RAM address
RAM address
X
3
X
2
X
1
X
0
Y
3
Y
2
Y
1
Y
0
W
W
0
1
W register
X register
Y register
AP
9
AP
8
AP
7
AP
6
AP
5
AP
4
AP
3
AP
2
1
AP
0
d
9
d
8
d
7
d
6
d
5
d
4
d
3
d
2
d
1
d
0
AP
9
AP
8
AP
7
AP
6
AP
5
AP
4
AP
3
AP
2
AP
1
AP
0
Opcode
m
3
m
2
m
1
m
0
Opcode
AP
9
AP
8
AP
7
AP
6
AP
5
AP
4
AP
3
AP
2
AP
1
AP
0
AP
Figure 44 RAM Addressing Modes
相關(guān)PDF資料
PDF描述
HD404326 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
HD4074449 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
HD404448 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
HD404449 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
HD4074459 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
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