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參數資料
| 型號： | MC68HC05P4A |
| 廠商： | Motorola, Inc. |
| 英文描述： | 28-pin MCU (microcontroller unit) based on the MC68HC05P4(28引腳、基于MC68HC05P4升級的8位微控制器單元) |
| 中文描述： | 28引腳單片機（微控制器）的基礎上MC68HC05P4（28引腳，基于MC68HC05P4升級的8位微控制器單元） |
| 文件頁數： | 72/102頁 |
| 文件大小： | 930K |
| 代理商： | MC68HC05P4A |
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Advance Information
MC68HC05P4A — Rev. 6.0
72
Instruction Set
MOTOROLA
Instruction Set
Indexed 8-bit offset instructions are useful for selecting the kth element
in an n-element table. The table can begin anywhere within the first 256
memory locations and could extend as far as location 510 ($01FE). The
k value is typically in the index register, and the address of the beginning
of the table is in the byte following the opcode.
11.3.7 Indexed, 16-Bit Offset
Indexed,16-bitoffsetinstructionsare3-byteinstructionsthatcanaccess
data with variable addresses at any location in memory. The CPU adds
the unsigned byte in the index register to the two unsigned bytes
following the opcode. The sum is the conditional address of the operand.
The first byte after the opcode is the high byte of the 16-bit offset; the
second byte is the low byte of the offset. These instructions can address
any location in memory.
Indexed,16-bitoffsetinstructionsareusefulforselectingthekthelement
in an n-element table anywhere in memory.
As with direct and extended addressing the Motorola assembler
determines the shortest form of indexed addressing.
11.3.8 Relative
Relative addressing is only for branch instructions. If the branch
condition is true, the CPU finds the conditional branch destination by
adding the signed byte following the opcode to the contents of the
program counter. If the branch condition is not true, the CPU goes to the
next instruction. The offset is a signed, two’s complement byte that gives
a branching range of –128 to +127 bytes from the address of the next
location after the branch instruction.
When using the Motorola assembler, the programmer does not need to
calculatetheoffset,becausetheassemblerdeterminestheproperoffset
and verifies that it is within the span of the branch.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC05P4DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P4P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P6_1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P8 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
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