参数资料
型号: AT90LS8535-8MI
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash
中文描述: 8-BIT, FLASH, 8 MHz, RISC MICROCONTROLLER, QCC44
封装: 7 X 7 MM, 1 MM HEIGHT, 0.50 MM PITCH, MLFP-44
文件页数: 10/127页
文件大小: 2454K
代理商: AT90LS8535-8MI
10
AT90S/LS8535
1041H
11/01
X-register, Y-register and Z-
register
The registers R26..R31 have some added functions to their general-purpose usage.
These registers are address pointers for indirect addressing of the Data Space. The
three indirect address registers, X, Y, and Z, are defined in Figure 7.
Figure 7.
X-, Y-, and Z-register
In the different addressing modes, these address registers have functions as fixed dis-
placement, automatic increment and decrement (see the descriptions for the different
instructions).
ALU
Arithmetic Logic
Unit
The high-performance AVR ALU operates in direct connection with all the 32 general-
purpose working registers. Within a single clock cycle, ALU operations between regis-
ters in the register file are executed. The ALU operations are divided into three main
categories: arithmetic, logical and bit functions.
In-System Programmable
Flash Program Memory
The AT90S8535 contains 8K bytes On-chip, In-System Programmable Flash memory
for program storage. Since all instructions are 16- or 32-bit words, the Flash is orga-
nized as 4K x 16. The Flash memory has an endurance of at least 1000 write/erase
cycles. The AT90S8535 Program Counter (PC) is 12 bits wide, thus addressing the
4096 program memory addresses.
See page 99 for a detailed description on Flash data downloading.
See page 12 for the different program memory addressing modes.
15
0
X-register
7
0
7
0
R27 ($1B)
R26 ($1A)
15
0
Y-register
7
0
7
0
R29 ($1D)
R28 ($1C)
15
0
Z-register
7
0
7
0
R31 ($1F)
R30 ($1E)
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