Short Direct Addressing - Renesas RL78/G1P Hardware User Manual

RL78/G1P

3.4.4 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
SADDR Label, or FFE20H to FFF1FH immediate data
SADDRP Label, or FFE20H to FFF1FH immediate data (even address only)
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.
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
Figure 3-19. Outline of Short Direct Addressing
Instruction code
OP code
saddr
CHAPTER 3 CPU ARCHITECTURE
Description
FFF1FH
saddr
FFE20H
Memory
52