Renesas RL78/G15 User Manual

RL78/G15 CHAPTER 3 CPU ARCHITECTURE
R01UH0959EJ0110 Rev.1.10 Page 84 of 765
Mar 7, 2023
3.5.4 Short direct addressing
[Function]
Short direct addressing directly specifies the target addresses using 8-bit data in the instruction word. This type of
addressing is applied only to the space from FFE20H to FFF1FH.
[Operand format]
Identifier Description
SADDR
Label, FFE20H to FFF1FH immediate data, or 0FE20H to 0FF1FH
immediate data
(only the space from FFE20H to FFF1FH is specifiable)
SADDRP
Label, FFE20H to FFF1FH immediate data, or 0FE20H to 0FF1FH
immediate data (even address only)
(only the space from FFE20H to FFF1FH is specifiable)
Figure 3-19. Outline of Short Direct Addressing
Instruction code
OP-code
saddr
FFF1FH
FFE20H
saddr
Memory
Remark SADDR and SADDRP are used to describe the values of addresses FE20H to FF1FH with 16-bit immediate
data (higher 4 bits of actual address are omitted), and the values of addresses FFE20H to FFF1FH with 20-
bit immediate data.
Regardless of whether SADDR or SADDRP is used, addresses within the space from FFE20H to FFF1FH
are specified for the memory.

Renesas RL78/G15 Specifications

General

Brand	Renesas
Model	RL78/G15
Category	Microcontrollers
Language	English