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參數(shù)資料
| 型號： | SC9RS08KA1J3CDB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO6 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, DFN-6 |
| 文件頁數(shù)： | 55/134頁 |
| 文件大小： | 3114K |
| 代理商： | SC9RS08KA1J3CDB |
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Chapter 4 Memory
SC9RS08KA2 Series Data Sheet, Rev. 1
Freescale Semiconductor
27
4.2
Unimplemented Memory
Attempting to access either data or an instruction at an unimplemented memory address will cause reset.
4.3
Indexed/Indirect Addressing
Register D[X] and register X together perform the indirect data access. Register D[X] is mapped to address
$000E. Register X is located in address $000F. The 8-bit register X contains the address that is used when
register D[X] is accessed. Register X is cleared to zero upon reset. By programming register X, any
location on the first page ($0000–$00FF) can be read/written via register D[X]. Figure 4-2 shows the
relationship between D[X] and register X. For example, in HC08/S08 syntax lda ,x is comparable to lda
D[X] in RS08 coding when register X has been programmed with the index value.
The physical location of $000E is in RAM. Accessing the location through D[X] returns $000E RAM
content when register X contains $0E. The physical location of $000F is register X, itself. Reading the
location through D[X] returns register X content; writing to the location modifies register X.
Figure 4-2. Indirect Addressing Registers
4.4
RAM and Register Addresses and Bit Assignments
The fast access RAM area can be accessed by instructions using tiny, short, and direct addressing mode
instructions. For tiny addressing mode instructions, the operand is encoded along with the opcode to a
single byte.
D[X]
Register X
Content of this location can be accessed via D[X]
$000E
$000F
$00FF
Address indicated in
$0100
Register X can specify
any location between
$0000–$00FF
Register X
$0000
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC9RS08KA1J3CPC | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers |
| SC9RS08KA1J3CSC | 制造商:Freescale Semiconductor 功能描述:8-BIT RS08 CISC 1KB FLASH 2.5V/3.3V/5V 8-PIN SOIC N RAIL - Rail/Tube 制造商:Freescale Semiconductor 功能描述:1K FLASH W/ ACMP 62 RAM |
| SC9RS08KA2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers |
| SC9RS08KA2J3CDB | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers |
| SC9RS08KA2J3CPC | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers |
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