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參數(shù)資料
| 型號： | AT43USB325E-AU |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Multimedia USB Keyboard Controller with Embedded Hub |
| 中文描述： | 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP64 |
| 封裝： | 1.40 MM HEIGHT, GREEN, PLASTIC, MS-026ACB, LQFP-64 |
| 文件頁數(shù)： | 10/109頁 |
| 文件大?。?/td> | 643K |
| 代理商： | AT43USB325E-AU |
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10
3355C–USB–4/05
AT43USB325
3.1
X-, Y- and Z- Registers
Registers R26..R31 contain some added functions to their general-purpose usage. These regis-
ters are address pointers for indirect addressing of the Data Space. The three indirect address
registers X, Y, and Z are defined as:
In the different addressing modes these address registers have functions as fixed displacement,
automatic increment and decrement (see the descriptions for the different instructions).
3.2
Arithmetic Logic Unit (ALU)
The high-performance AVR ALU operates in direct connection with all 32 general-purpose work-
ing registers. Within a single clock cycle, ALU operations between registers in the register file
are executed. The ALU operations are divided into three main categories – arithmetic, logical
and bit-functions.
3.3
Program Memory
The AT43USB325E contains 16K bytes on-chip downloadable memory for program storage
while the AT43USB325M has a masked programmable ROM. Since all instructions are 16- or
32-bit words, the program memory is organized as 8K x 16. The AT43USB325 Program Counter
(PC) is 13 bits wide, thus addressing the 8,192 program memory addresses.
Constant tables can be allocated within the entire program memory address space (see the LPM
- Load Program Memory instruction description).
The program memory of the AT43USB325E is automatically written with data stored in an exter-
nal serial EEPROM during the chip's power on reset sequence. The power on reset is the only
way the on-chip program memory of the AT43USB325E will be written or modified.
The two versions of the AT43USB325 are binary compatible. A firmware written for the
AT43USB325E will work unaltered on the AT43USB325M. The only functional difference
X-register
15
XH
XL
0
7
0
7
0
R27 ($1B)
R26 ($1A)
Y-register
15
YH
YL
0
7
0
7
0
R29 ($1D)
R28 ($1C)
Z-register
15
ZH
ZL
0
7
0
7
0
R30 ($1F)
R31 ($1E)
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| AT43USB326-AU | Multimedia USB Keyboard Controller with Embedded Hub |
| AT43USB351M-AC | Full-speed/Low-speed USB Microcontroller with ADC and PWM |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT43USB326 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
| AT43USB326_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Multimedia USB Keyboard Controller with Embedded Hub |
| AT43USB326-AC | 功能描述:USB 接口集成電路 USB KEYBOARD F/LOGI- TECH - COM TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43USB326-AU | 功能描述:USB 接口集成電路 USB KEYBOARD FOR LOGITECH - IND TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43USB351M | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
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