UPD78F0411GA-GAM-AX Datasheet, PDF (73/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 3 CPU ARCHITECTURE
3.4.5 Special function register (SFR) addressing
[Function]
A memory-mapped special function register (SFR) is addressed with 8-bit immediate data in an instruction word.
This addressing is applied to the 240-byte spaces FF00H to FFCFH and FFE0H to FFFFH. However, the SFRs
mapped at FF00H to FF1FH can be accessed with short direct addressing.
[Operand format]
Identifier
sfr
sfrp
Description
Special function register name
16-bit manipulatable special function register name (even address only)
[Description example]
MOV PM0, A; when selecting PM0 (FF20H) as sfr
Operation code
11110110
OP code
[Illustration]
7
00100000
20H (sfr-offset)
0
OP code
sfr-offset
15
87
Effective address 1 1 1 1 1 1 1 1
SFR
0
User’s Manual U18698EJ1V0UD
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