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參數(shù)資料
| 型號(hào)： | SDA5254 |
| 廠商： | SIEMENS A G |
| 元件分類： | 圖文 |
| 英文描述： | 8-BIT SINGLE CHIP MICROCONTROLLERS |
| 中文描述： | TELETEXT AND VPS/PDC DECODER, PDIP52 |
| 文件頁(yè)數(shù)： | 42/143頁(yè) |
| 文件大?。?/td> | 1050K |
| 代理商： | SDA5254 |
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SDA 525x
Semiconductor Group
42
1998-04-08
6.3
Microcontroller
6.3.1
The CPU manipulates operands in two memory spaces: the program memory space,
and the data memory space. The program memory address space is provided to
accommodate relocatable code.
The data memory address space is divided into the 256-byte internal data RAM, XRAM
(extended data memory, accessible with MOVX-instructions) and the 128-byte Special
Function Register (SFR) address spaces. Four register banks (each bank has eight
registers), 128 addressable bits, and the stack reside in the internal data RAM. The stack
depth is limited only by the available internal data RAM. It’s location is determined by the
8-bit stack pointer. All registers except the program counter and the four 8-register banks
reside in the special function register address space. These memory mapped registers
include arithmetic registers, pointers, I/O-ports, registers for the interrupt system, timers,
pulse width modulator and serial channel. Many locations in the SFR-address space are
addressable as bits.
Note that reading from unused locations within data memory will yield undefined data.
Conditional branches are performed relative to the 16 bit program counter. The register-
indirect jump permits branching relative to a 16-bit base register with an offset provided
by an 8-bit index register. Sixteen-bit jumps and calls permit branching to any location in
the memory address space.
The processor as five methods for addressing source operands: register, direct, register-
indirect, immediate, and base-register plus index-register indirect addressing.
The first three methods can be used for addressing destination operands. Most
instructions have a “destination, source” field that specifies the data type, addressing
methods and operands involved. For operations other than moves, the destination
operand is also a source operand.
Registers in the four 8-register banks can be accessed through register, direct, or
register-indirect addressing; the lower 128 bytes of internal data RAM through direct or
register-indirect addressing, the upper 128 bytes of internal data RAM through register-
indirect addressing; and the special function registers through direct addressing. Look-
up tables resident in program memory can be accessed through base-register plus
index-register indirect addressing.
Architecture
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SDA5254-2 | ICs for Consumer Electronics |
| SDA 5251 | TVTEXT 8-Bit Microcontroller(ROM-Versions )(TV視頻的8位微控制器（含ROM 型 ）) |
| SDA 5252 | TVTEXT 8-Bit Microcontroller(ROM-Versions )(TV視頻的8位微控制器（含ROM 型 ）) |
| SDA 5254 | TVTEXT 8-Bit Microcontroller(ROM-Versions )(TV視頻的8位微控制器（含ROM 型 ）) |
| SDA5254M | ICs for Consumer Electronics |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SDA5254-2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
| SDA5254M | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
| SDA5254M-2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
| SDA5255 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
| SDA5255-2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
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