UPD78F1502AGK-GAK-AX Datasheet, PDF (127/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 3 CPU ARCHITECTURE
3.4 Addressing for Processing Data Addresses
3.4.1 Implied addressing
[Function]
Instructions for accessing registers (such as accumulators) that have special functions are directly specified with the
instruction word, without using any register specification field in the instruction word.
[Operand format]
Because implied addressing can be automatically employed with an instruction, no particular operand format
is necessary.
Implied addressing can be applied only to MULU X.
Figure 3-19. Outline of Implied Addressing
OP code
A register
Memory
3.4.2 Register addressing
[Function]
Register addressing accesses a general-purpose register as an operand. The instruction word of 3-bit long is used
to select an 8-bit register and the instruction word of 2-bit long is used to select a 16-bit register.
[Operand format]
Identifier
r
rp
Description
X, A, C, B, E, D, L, H
AX, BC, DE, HL
Figure 3-20. Outline of Register Addressing
OP code
Register
Memory
R01UH0004EJ0501 Rev.5.01
111
Jun 20, 2011