参数资料
型号: 78098B
厂商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件页数: 28/129页
文件大小: 644K
代理商: 78098B
28
CHAPTER 3 ADDRESSING
User's Manual U12326EJ4V0UM
15
0
SFR
Effective
address
1
1
1
1
1
1
1
8 7
0
7
OP code
sfr-offset
1
3.2.5 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
Description
sfr
Special function register name
sfrp
16-bit-manipulatable special function register name (even address only)
[Description example]
MOV PM0, A; When selecting PM0 for sfr
[Illustration]
Instruction code
1
1
1
1
0
1
1
0
OP code
0
0
1
0
0
0
0
0
20H (sfr-offset)
相关PDF资料
PDF描述
78044H Common to 78K/0 Series
78058F common to 78K/0 Series
780001 Common to 78K/0 Series
780018Y Common to 78K/0 Series
780024 Common to 78K/0 Series
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