- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363666 > NSC800N (National Semiconductor Corporation) NSC800TM High-Performance Low-Power CMOS Microprocessor PDF資料下載
參數(shù)資料
| 型號： | NSC800N |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | NSC800TM High-Performance Low-Power CMOS Microprocessor |
| 中文描述： | NSC800TM高性能低功耗CMOS微處理器 |
| 文件頁數(shù)： | 25/76頁 |
| 文件大?。?/td> | 785K |
| 代理商： | NSC800N |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當(dāng)前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁
NSC800 SOFTWARE
10.0 Introduction
This chapter provides the reader with a detailed description
of the NSC800 software. Each NSC800 instruction is de-
scribed in terms of opcode, function, flags affected, timing,
and addressing mode.
11.0 Addressing Modes
The following sections describe the addressing modes sup-
ported by the NSC800. Note that particular addressing
modes are often restricted to certain types of instructions.
Examples of instructions used in the particular addressing
modes follow each mode description.
The 10 addressing modes and 158 instructions provide a
flexible and powerful instruction set.
11.1 REGISTER
The most basic addressing mode is that which addresses
data in the various CPU registers. In these cases, bits in the
opcode select specific registers that are to be addressed by
the instruction.
Example:
Instruction: Load register B from register C
Mnemonic: LD
B,C
Opcode:
TL/C/5171–50
In this instruction, both the B and C registers are addressed
by opcode bits.
11.2 IMPLIED
The implied addressing mode is an extension to the register
addressing mode. In this mode, a specific register, the accu-
mulator, is used in the execution of the instruction. In partic-
ular, arithmetic operations employ implied addressing, since
the A register is assumed to be the destination register for
the result without being specifically referenced in the op-
code.
Example:
Instruction: Subtract the contents of register D from the
Accumulator (A register)
Mnemonic: SUB
D
Opcode:
TL/C/5171–51
In this instruction, the D register is addressed with register
addressing, while the use of the A register is implied by the
opcode.
11.3 IMMEDIATE
The most straightforward way of introducing data to the
CPU registers is via immediate addressing, where the data
is contained in an additional byte of multi-byte instructions.
Example:
Instruction: Load the E register with the constant value
X’7C.
Mnemonic: LD
E,X’7C
Opcode:
TL/C/5171–52
In this instruction, the E register is addressed with register
addressing, while the constant X’7C is immediate data in the
second byte of the instruction.
11.4 IMMEDIATE EXTENDED
As immediate addressing allows 8 bits of data to be sup-
plied by the operand, immediate extended addressing al-
lows 16 bits of data to be supplied by the operand. These
are in two additional bytes of the instruction.
Example:
Instruction: Load the 16-bit IX register with the constant
value X’ABCD.
Mnemonic: LD
IX,X’ABCD
Opcode:
TL/C/5171–53
In this instruction, register addressing selects the IX regis-
ter, while the 16-bit quanity X’ABCD is immediate data sup-
plied as immediate extended format.
25
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NSC800V | NSC800TM High-Performance Low-Power CMOS Microprocessor |
| NSC858 | NSC858 Universal Asynchronous Receiver/Transmitter |
| NSC858D | NSC858 Universal Asynchronous Receiver/Transmitter |
| NSC858E | NSC858 Universal Asynchronous Receiver/Transmitter |
| NSC858N | NSC858 Universal Asynchronous Receiver/Transmitter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NSC800N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microprocessor |
| NSC800N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microprocessor |
| NSC800N-1 | 制造商:Texas Instruments 功能描述: |
| NSC800N-1/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microprocessor |
| NSC800N-1/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microprocessor |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。