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參數資料
| 型號： | MC68HC705BD3 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁數： | 83/112頁 |
| 文件大小： | 676K |
| 代理商： | MC68HC705BD3 |
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MC68HC05BD3
MOTOROLA
9-11
CPU CORE AND INSTRUCTION SET
9
9.3
Addressing modes
Ten different addressing modes provide programmers with the flexibility to optimize their code for
all situations. The various indexed addressing modes make it possible to locate data tables, code
conversion tables and scaling tables anywhere in the memory space. Short indexed accesses are
single byte instructions; the longest instructions (three bytes) enable access to tables throughout
memory. Short absolute (direct) and long absolute (extended) addressing are also included. One
or two byte direct addressing instructions access all data bytes in most applications. Extended
addressing permits jump instructions to reach all memory locations.
The term ‘effective address’ (EA) is used in describing the various addressing modes. The
effective address is defined as the address from which the argument for an instruction is fetched
or stored. The ten addressing modes of the processor are described below. Parentheses are used
to indicate ‘contents of’ the location or register referred to. For example, (PC) indicates the
contents of the location pointed to by the PC (program counter). An arrow indicates ‘is replaced
by’ and a colon indicates concatenation of two bytes. For additional details and graphical
illustrations, refer to the
M6805 HMOS/M146805 CMOS Family Microcomputer/
Microprocessor User's Manual
or to the
M68HC05 Applications Guide
.
9.3.1
Inherent
In the inherent addressing mode, all the information necessary to execute the instruction is
contained in the opcode. Operations specifying only the index register or accumulator, as well as
the control instruction, with no other arguments are included in this mode. These instructions are
one byte long.
9.3.2
Immediate
In the immediate addressing mode, the operand is contained in the byte immediately following the
opcode. The immediate addressing mode is used to access constants that do not change during
program execution (e.g. a constant used to initialize a loop counter).
EA = PC+1; PC
←
PC+2
9.3.3
Direct
In the direct addressing mode, the effective address of the argument is contained in a single byte
following the opcode byte. Direct addressing allows the user to directly address the lowest 256
bytes in memory with a single two-byte instruction.
EA = (PC+1); PC
←
PC+2
Address bus high
←
0; Address bus low
←
(PC+1)
TPG
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| MC68HC05C8A | Microcontrollers |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC705BD3P | 制造商:Motorola 功能描述:MOTOROLA NXC4C |
| MC68HC705BD7P1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HC705C4ACP | 制造商:Freescale Semiconductor 功能描述: |
| MC68HC705C8AB | 功能描述:IC MCU 8K OTP 2.1MHZ 42-SDIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數:21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數據轉換器:A/D 6x12b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| MC68HC705C8ACB | 制造商:Rochester Electronics LLC 功能描述:HCO5 CORE + 8K RAM + EPR - Bulk |
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