參數(shù)資料
型號(hào)： AT90USB1287-16AUR
廠商： Atmel
文件頁(yè)數(shù)： 24/106頁(yè)
文件大?。?/td> 0K
描述： IC MCU AVR 128K ISP USB TQFP64
產(chǎn)品培訓(xùn)模塊： megaAVR Introduction
標(biāo)準(zhǔn)包裝： 1,000
系列： AVR® 90USB
核心處理器： AVR
芯體尺寸： 8-位
速度： 16MHz
連通性： EBI/EMI，I²C，SPI，UART/USART，USB，USB OTG
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 48
程序存儲(chǔ)器容量： 128KB（128K x 8）
程序存儲(chǔ)器類型： 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量： 8K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 64-LQFP
包裝： 帶卷 (TR)
配用： ATSTK600-ND - DEV KIT FOR AVR/AVR32
ATSTK525-ND - KIT STARTER FOR AT90USB
AT90USBKEY2-ND - KIT DEMO FOR AT90USB
24
7593L–AVR–09/12
AT90USB64/128
Figure 6-3.
On-chip data SRAM access cycles.
6.3
EEPROM data memory
The Atmel AT90USB64/128 contains 2K/4K bytes of data EEPROM memory. It is organized as
a separate data space, in which single bytes can be read and written. The EEPROM has an
endurance of at least 100,000 write/erase cycles. The access between the EEPROM and the
CPU is described in the following, specifying the EEPROM Address Registers, the EEPROM
Data Register, and the EEPROM Control Register.
For a detailed description of SPI, JTAG and Parallel data downloading to the EEPROM, see
page 373, page 377, and page 362 respectively.
6.3.1
EEPROM Read/Write Access
The EEPROM Access Registers are accessible in the I/O space.
The write access time for the EEPROM is given in Table 6-3. A self-timing function, however,
lets the user software detect when the next byte can be written. If the user code contains instruc-
tions that write the EEPROM, some precautions must be taken. In heavily filtered power
supplies, V
CC is likely to rise or fall slowly on power-up/down. This causes the device for some
period of time to run at a voltage lower than specified as minimum for the clock frequency used.
See “Preventing EEPROM corruption” on page 29. for details on how to avoid problems in these
situations.
In order to prevent unintentional EEPROM writes, a specific write procedure must be followed.
Refer to the description of the EEPROM Control Register for details on this.
When the EEPROM is read, the CPU is halted for four clock cycles before the next instruction is
executed. When the EEPROM is written, the CPU is halted for two clock cycles before the next
instruction is executed.
clk
WR
RD
Data
Address
Address valid
T1
T2
T3
Compute address
Read
Wr
ite
CPU
Memory access instruction
Next instruction
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT90USB1287-16ME 制造商:Atmel Corporation 功能描述:
AT90USB1287-16MU 功能描述:8位微控制器 -MCU 128kB Flash 4kB EEPROM 48 I/O Pins RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90USB1287-64QFN 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT90USB1287 (AVR) 64 QFN device (2.7V VCC 5.5V)
AT90USB1287-AU 功能描述:8位微控制器 -MCU AVR USB 128K FLASH 16 MHz,Ind Temp RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90USB1287-AUR 功能描述:8位微控制器 -MCU USB 128K FLASH 16 MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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