參數(shù)資料
型號(hào)： 80376
廠商： Intel Corp.
英文描述： 32-BIT Embedded Microprocessor(32位嵌入式微處理器)
中文描述： 32位嵌入式微處理器（32位嵌入式微處理器）
文件頁數(shù)： 89/95頁
文件大小： 1086K
代理商： 80376
376 EMBEDDED PROCESSOR
ENCODING OF THE SEGMENT
REGISTER (sreg) FIELD
The sreg field in certain instructions is a 2-bit field
allowing one of the CS, DS, ES or SS segment regis-
ters to be specified. The sreg field in other instruc-
tions is a 3-bit field, allowing the FS and GS segment
registers to be specified also.
2-Bit sreg2 Field
2-Bit
Segment
Register
Selected
sreg2 Field
00
01
10
11
ES
CS
SS
DS
3-Bit sreg3 Field
3-Bit
Segment
Register
Selected
sreg3 Field
000
001
010
011
100
101
110
111
ES
CS
SS
DS
FS
GS
do not use
do not use
ENCODING OF ADDRESS MODE
Except for special instructions, such as PUSH or
POP, where the addressing mode is pre-determined,
the addressing mode for the current instruction is
specified by addressing bytes following the primary
opcode. The primary addressing byte is the ‘‘mod
r/m’’ byte, and a second byte of addressing informa-
tion, the ‘‘s-i-b’’ (scale-index-base) byte, can be
specified.
The s-i-b byte (scale-index-base byte) is specified
when using 32-bit addressing mode and the ‘‘mod
r/m’’ byte has r/m
e
100 and mod
e
00, 01 or 10.
When the sib byte is present, the 32-bit addressing
mode is a function of the mod, ss, index, and base
fields.
The primary addressing byte, the ‘‘mod r/m’’ byte,
also contains three bits (shown as TTT in Figure 8.1)
sometimes used as an extension of the primary op-
code. The three bits, however, may also be used as
a register field (reg).
When calculating an effective address, either 16-bit
addressing or 32-bit addressing is used. 16-bit ad-
dressing uses 16-bit address components to calcu-
late the effective address while 32-bit addressing
uses 32-bit address components to calculate the ef-
fective address. When 16-bit addressing is used, the
‘‘mod r/m’’ byte is interpreted as a 16-bit addressing
mode specifier. When 32-bit addressing is used, the
‘‘mod r/m’’ byte is interpreted as a 32-bit addressing
mode specifier.
Tables on the following three pages define all en-
codings of all 16-bit addressing modes and 32-bit
addressing modes.
89
相關(guān)PDF資料
PDF描述
804-2 RECTIFIERS ASSEMBLIES
804-3 RECTIFIERS ASSEMBLIES
804-4 RECTIFIERS ASSEMBLIES
8040AHL HMOS SINGLE-COMPONENT 8-BIT MICROCONTROLLER
8048AH HMOS SINGLE-COMPONENT 8-BIT MICROCONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
803760 制造商:Schaffner 功能描述:Power Entry Module Filtered M 3 POS 250VAC 3A ST 1 Port 制造商:Schaffner 功能描述:FILTER PERFORMANCE IEC INLET 3A
803761 制造商:Schaffner 功能描述:Power Entry Module Filtered M 3 POS 250VAC 6A ST 1 Port 制造商:Schaffner 功能描述:FILTER PERFORMANCE IEC INLET 6A
803762 制造商:Schaffner 功能描述:Power Entry Module Filtered M 3 POS 250VAC 10A ST 1 Port 制造商:Schaffner 功能描述:FILTER PERFORMANCE IEC INLET 10A
803763 制造商:Schaffner 功能描述:Power Entry Module Filtered M 3 POS 250VAC 1A ST 1 Port 制造商:Schaffner 功能描述:FILTER PERFORM SNAP-IN INLET 1A
803764 制造商:Schaffner 功能描述:Power Entry Module Filtered M 3 POS 250VAC 3A ST 1 Port 制造商:Schaffner 功能描述:FILTER PERFORM SNAP-IN INLET 3A
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