HD404344R Datasheet, PDF (86/102 Pages) Renesas Technology Corp – 4-bit microcomputer has an A/D converter

HD404344R Series/HD404394 Series
Addressing Mode for P Instruction: By using the P instruction, the ROM data determined by table data
addressing can be referenced. The lower-order 8 bits of ROM data are written in the accumulator and the B
register when bit 8 of the ROM data is 1, and are written in the R1 and R2 port output registers when bit 9
is 1. If bit 8 and bit 9 are both 1, the ROM data is simultaneously written into the accumulator, the B
register, and the R1 and R2 port output registers. (See figure 64.)
The program counter is not affected by the P instruction.
Instruction
[P]
Opcode
p₃ p₂ p₁ p₀
B register
Accumulator
00
B₃ B₂ B₁ B₀ A₃ A₂ A₁ A₀
Referenced ROM address RA₁₃ RA₁₂ RA₁₁ RA₁₀ RA₉ RA₈ RA₇ RA₆ RA₅ RA₄ RA₃ RA₂ RA₁ RA₀
Address
ROM data
RO₉ RO₈ RO₇ RO₆ RO₅ RO₄ RO₃ RO₂ RO₁ RO₀
Accumulator, B register ^B3 ^B2 ^B1 ^B0 ^A3 ^A2 ^A1 ^A0 RO₈ = 1
ROM data
RO₉ RO₈ RO₇ RO₆ RO₅ RO₄ RO₃ RO₂ RO₁ RO₀
Output registers R1, R2 ^R23 ^R22 ^R21 ^R20 ^R13 ^R12 ^R11 ^R10 RO₉ = 1
Pattern Output
Figure 64 P Instruction
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