Special Function Register (Sfr) Addressing - NEC mPD789026 Subseries User Manual

3.4.3 Special function register (SFR) addressing

[Function]
The 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 SFR
mapped at FF00H to FF1FH can also be accessed with short direct addressing.
[Operand format]
Identifier
sfr Special function register name
[Example]
MOV PM0, A; When selecting PM0 for sfr
[Illustration]
7
OP Code
sfr-offset
15
Effective
1 1 1
Address
CHAPTER 3 CPU ARCHITECTURE
Instruction Code 1 1
0 0
0
8 7
1 1 1 1 1
User's Manual U11919EJ3V0UM00
Description
1 0 0 1 1 1
1 0 0 0 0 0
0
SFR
65