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HD404339FS 데이터시트(PDF) 16 Page - Renesas Technology Corp

부품명 HD404339FS
상세설명  microcomputer with large-capacity memory designed to
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404339FS 데이터시트(HTML) 16 Page - Renesas Technology Corp

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HD404339 Series
14
Addressing Modes
RAM Addressing Modes
Register Indirect Addressing Mode: The contents of the W, X, and Y registers (10 bits 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 (LAMR, XMRA): The memory registers (MR), which are located
in 16 addresses from $040 to $04F, are accessed with the LAMR and XMRA instructions.
0
0
9
9
Opcode
Register Indirect Addressing
2nd instruction
word
RAM address
Direct Addressing
Instruction
9
0
0
9
RAM address
1st instruction
word
3
7
30
Memory Register Addressing
0
9
RAM address 000100
Opcode
Instruction
30 30
0
1
W
X
Y
Figure 7 RAM Addressing Modes



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