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参数资料
| 型号： | AT90S4434 |
| 厂商： | Atmel Corp. |
| 元件分类： | 8位微控制器 |
| 英文描述： | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| 中文描述： | 位AVR微控制器具有8K字节的系统内可编程闪存 |
| 文件页数： | 6/13页 |
| 文件大小： | 528K |
| 代理商： | AT90S4434 |
AT90S/LS4434 and AT90S/LS8535
6
The I/O memory space contains 64 addresses for CPU peripheral functions as Control Registers, Timer/Counters, A/D-
converters, and other I/O functions. The I/O Memory can be accessed directly, or as the Data Space locations following
those of the register file, $20 - $5F.
The AVR uses a Harvard architecture concept - with separate memories and buses for program and data. The program
memory is executed with a two stage pipeline. While one instruction is being executed, the next instruction is pre-fetched
from the program memory. This concept enables instructions to be executed in every clock cycle. The program memory is
in-system downloadable Flash memory.
With the relative jump and call instructions, the whole 2K/4K address space is directly accessed. Most AVR instructions
have a single 16-bit word format. Every program memory address contains a 16- or 32-bit instruction.
During interrupts and subroutine calls, the return address program counter (PC) is stored on the stack. The stack is effec-
tively allocated in the general data SRAM, and consequently the stack size is only limited by the total SRAM size and the
usage of the SRAM. All user programs must initialize the SP in the reset routine (before subroutines or interrupts are exe-
cuted). The 9/10-bit stack pointer SP is read/write accessible in the I/O space.
The 256/512 bytes data SRAM can be easily accessed through the five different addressing modes supported in the AVR
architecture.
The memory spaces in the AVR architecture are all linear and regular memory maps.
Figure 3.
Memory Maps
A flexible interrupt module has its control registers in the I/O space with an additional global interrupt enable bit in the status
register. All the different interrupts have a separate interrupt vector in the interrupt vector table at the beginning of the pro-
gram memory. The different interrupts have priority in accordance with their interrupt vector position. The lower the
interrupt vector address, the higher the priority.
32 Gen. Purpose
Working Registers
64 I/O Registers
Internal SRAM
(256/512 x 8)
$0000
$001F
$0020
$005F
$0060
$015F/$025F
$000
$7FF/$FFF
Data Memory
Program Memory
Program Flash
(2K/4K x 16)
EEPROM
(256/512 x 8)
$000
$0FF/$1FF
Data Memory
相关PDF资料 |
PDF描述 |
|---|---|
| AT90LS8535-4MC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535 | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535-4AC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535-4AI | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535-4JC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT90S4434-8AC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K/8K Bytes In-System Programmable Flash |
| AT90S4434-8AI | 制造商:Atmel Corporation 功能描述:MicroController, 8-Bit, 44 Pin, Plastic, TQFP |
| AT90S4434-8JC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K/8K Bytes In-System Programmable Flash |
| AT90S4434-8JI | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K/8K Bytes In-System Programmable Flash |
| AT90S4434-8PC | 制造商:Atmel Corporation 功能描述: 制造商:Atmel Corporation 功能描述:MicroController, 8-Bit, 40 Pin, Plastic, DIP |
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