HD404344R Datasheet, PDF (85/102 Pages) Renesas Technology Corp – 4-bit microcomputer has an A/D converter

HD404344R Series/HD404394 Series
Current Page Addressing Mode: A program can branch to any address in the current page (256 words per
page) by executing the BR instruction.
Zero-Page Addressing Mode: A program can branch to any subroutine located in the zero-page
subroutine area ($0000–$003F) by executing the CAL instruction.
Table Data Addressing Mode: A program can branch to an address determined by the contents of 4-bit
immediate data, the accumulator, and the B register by executing the TBR instruction.
1st
2nd
instruction word instruction word
9
3
09
0
Opcode
Operand
Opcode ⁹
5
0
Operand
13
Program counter
Direct Addressing
0
13
0
Program counter 0 0 0 0 0 0 0 0
Zero-Page Addressing
Opcode
97
0
Operand
Operand
9
3
Opcode
07
B
0
A
13
0
13
0
Program counter * * * * * *
Program counter 0 0
Current Page Addressing
Table Data Addressing
Figure 63 ROM Addressing Modes
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