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| HD404328 Datasheet, PDF (76/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER | |||
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HD404328 Series
[JMPL]
[BRL]
[CALL]
1st word of instruction
2nd word of instruction
Opcode
p3 p2 p1 p0 d 9 d 8 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0
Program counter PC13 PC12 PC11 PC10 PC 9 PC 8 PC 7 PC 6 PC 5 PC 4 PC 3 PC 2 PC 1 PC0
Direct Addressing
Instruction
[BR] Opcode b 7 b 6 b 5 b 4 b 3 b 2 b 1 b 0
Program counter PC13 PC12 PC11 PC10 PC 9 PC 8 PC 7 PC 6 PC 5 PC 4 PC 3 PC 2 PC 1 PC0
Current Page Addressing
Instruction
[CAL]
Opcode
a5 a4 a3 a2 a1 a0
00000000
Program counter PC13 PC12 PC11 PC10 PC 9 PC 8 PC 7 PC 6 PC 5 PC 4 PC 3 PC 2 PC 1 PC0
Zero Page Addressing
[TBR]
Instruction
Opcode
p3 p2 p1 p0
B register
Accumulator
00
B3 B2 B1 B0 A3 A2 A1 A0
Program counter PC13 PC12 PC11 PC10 PC 9 PC 8 PC 7 PC 6 PC 5 PC 4 PC 3 PC 2 PC 1 PC0
Table Data Addressing
Figure 45 ROM Addressing Modes
74
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