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參數(shù)資料
| 型號： | MC68HC05C9ECP |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 73/106頁 |
| 文件大?。?/td> | 659K |
| 代理商： | MC68HC05C9ECP |
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MC68HC05C9E Advance Information Data Sheet, Rev. 0.1
Freescale Semiconductor
69
Chapter 11
Instruction Set
The microcontroller unit (MCU) instruction set has 62 instructions and uses eight addressing modes. The
instructions include all those of the M146805 CMOS (complementary metal-oxide semiconductor) Family
plus one more: the unsigned multiply (MUL) instruction. The MUL instruction allows unsigned
multiplication of the contents of the accumulator (A) and the index register (X). The high-order product is
stored in the index register, and the low-order product is stored in the accumulator.
11.1 Addressing Modes
The central processor unit (CPU) uses eight addressing modes for flexibility in accessing data. The
addressing modes provide eight different ways for the CPU to find the data required to execute an
instruction. The eight addressing modes are:
Inherent
Immediate
Direct
Extended
Indexed, no offset
Indexed, 8-bit offset
Indexed, 16-bit offset
Relative
11.1.1 Inherent
Inherent instructions are those that have no operand, such as return from interrupt (RTI) and stop (STOP).
Some of the inherent instructions act on data in the CPU registers, such as set carry flag (SEC) and
increment accumulator (INCA). Inherent instructions require no operand address and are one byte long.
11.1.2 Immediate
Immediate instructions are those that contain a value to be used in an operation with the value in the
accumulator or index register. Immediate instructions require no operand address and are two bytes long.
The opcode is the first byte, and the immediate data value is the second byte.
11.1.3 Direct
Direct instructions can access any of the first 256 memory locations with two bytes. The first byte is the
opcode, and the second is the low byte of the operand address. In direct addressing, the CPU
automatically uses $00 as the high byte of the operand address.
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相關(guān)代理商/技術(shù)參數(shù) |
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| MC68HC05CT4FB | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
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| MC68HC05E0FN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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