- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360558 > 90S8535 (Atmel Corp.) -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash PDF資料下載
參數(shù)資料
| 型號： | 90S8535 |
| 廠商： | Atmel Corp. |
| 元件分類： | 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字節(jié)的系統(tǒng)內可編程閃存 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 482K |
| 代理商： | 90S8535 |
AT90S/LS4434 and AT90S/LS8535
5
The ALU supports arithmetic and logic functions between
registers or between a constant and a register. Single reg-
ister operations are also executed in the ALU. Figure 3
shows the AT90S4434/8535 AVR Enhanced RISC micro-
controller architecture.
In addition to the register operation, the conventional mem-
ory addressing modes can be used on the register file as
well. This is enabled by the fact that the register file is
assigned the 32 lowermost Data Space addresses ($00 -
$1F), allowing them to be accessed as though they were
ordinary memory locations.
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 sepa-
rate memories and buses for program and data. The pro-
gram memory is executed with a single level pipelining.
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 pro-
gram 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
effectively allocated in the general data SRAM, and conse-
quently the stack size is only limited by the total SRAM size
and the usage of the SRAM. All user programs must initial-
ize the SP in the reset routine (before subroutines or inter-
rupts are executed). The 9-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 4.
Memory Maps
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)
$0000
$1F/$FF
Data Memory
相關PDF資料 |
PDF描述 |
|---|---|
| 90SCFM | 20SCFM |
| 90SMO | Crystal Clock Oscillators (+3.3V or +5.0V FIXED MODELS) |
| 90SQ | SCHOTTKY RECTIFIER |
| 90SQ035 | SCHOTTKY RECTIFIER |
| 90SQ040 | SCHOTTKY RECTIFIER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 90SC15B | 制造商:NDK 制造商全稱:NDK 功能描述:four-pole crystal filter with a built-in coupling capacitor |
| 90SCFM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:20SCFM |
| 90SERIES | 制造商:MALLORY 制造商全稱:MALLORY 功能描述:POINT TYPE DISTRIBUTOR |
| 90SMO | 制造商:FORMOSA 制造商全稱:Formosa MS 功能描述:Crystal Clock Oscillators (+3.3V or +5.0V FIXED MODELS) |
| 90SMX | 制造商:EUROQUARTZ 制造商全稱:EUROQUARTZ limited 功能描述:32.768kHz SMD 8.7 x 3.8 x 2.5mm |
發(fā)布緊急采購，3分鐘左右您將得到回復。