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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, 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)
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 16-bit or 20-bit immediate data is used, addresses within the space from FFE20H
to FFF1FH are specified for the memory.
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CHAPTER 3 CPU ARCHITECTURE
Figure 3-27. Outline of Short Direct Addressing
OP code
saddr
User's Manual U17854EJ9V0UD
Description
FFF1FH
saddr
FFE20H
Memory
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