
The Microchip Technology Inc. 24AA02UID is a 2Kb Serial EEPROM with a pre-programmed, 32-bit unique ID. This serial number is unique across all UID-Family of EEPROMs. The ID is Scalable to 48-bit, 64-bit, 128-bit, 256-bit, and other lengths.The device is organized as two blocks of 128 x 8-bit memory with a 2-wire serial interface. Low-voltage design permits operation down to 1.7V, with maximum standby and active currents of only 1 uA and 1 mA, respectively. The 24AA02UID also has a page write capability for up to 8 bytes of data. The 24AA02UID is available in the standard 8-pin PDIP, 8-pin SOIC, 5-lead SOT-23 packages.
Pre-programmed 32-bit Serial Number
Unique Across All UID-Family EEPROMs
Scalable to 48-bit, 64-bit, 128-bit, 256-bit, and other lengths
Single Supply with Operation Down to 1.7V
Low-Power CMOS Technology: Read current 1 mA, max.; Standby current 1 uA, max.
2-Wire Serial Interface, I2C? Compatible
Schmitt Trigger Inputs for Noise Suppression
Output Slope Control to Eliminate Ground Bounce
100 kHz and 400 kHz Clock Compatibility
Page Write Time 3 ms, typical
Self-Timed Erase/Write Cycle
Page Write Buffer:- 8-byte page
ESD Protection >4,000V
More than 1 Million Erase/Write Cycles
Data Retention >200 Years
Factory Programming Available
Available Packages:- 8-lead PDIP, 8-lead SOIC, and 5-lead SOT-23
Pb-free and RoHS Compliant
Temperature Ranges:- Industrial (I): -40°C to +85°C
24AA02UID 封裝圖
24AA02UID 封裝圖
24AA02UID 封裝圖
型號(hào) | 制造商 | 描述 | 購(gòu)買(mǎi) |
---|---|---|---|
24AA02UIDT-I/SN | SiTime | 有源晶振 10MHz ±25ppm 2.8V SMD7050_6P_EP | 立即購(gòu)買(mǎi) |
24AA02UID-I/SN | Micron | IC DRAM 128MBIT PARALLEL 60VFBGA | 立即購(gòu)買(mǎi) |
24AA02UIDT-I/OT | CYPRESS | IC CLOCK SS LOW EMI 8-SOIC | 立即購(gòu)買(mǎi) |
24AA02UID-I/P | ABLIC Inc. | IC REG LINEAR 2.2V 200MA SC82AB | 立即購(gòu)買(mǎi) |
本文主要介紹了一下目前市場(chǎng)上面24C02幾種打線(xiàn)方式的區(qū)別,有利于消費(fèi)者在芯片選型替代、電路設(shè)計(jì)、軟件編程的注意一些細(xì)節(jié),另外就是給出了用C語(yǔ)言軟件模擬I2C協(xié)議和用匯編語(yǔ)言軟件模擬I2C協(xié)議對(duì)24C02進(jìn)行存取數(shù)據(jù)的代碼
UID代表用戶(hù)標(biāo)識(shí)符。UID是分配給每個(gè)Linux用戶(hù)的數(shù)字。它是用戶(hù)在Linux內(nèi)核中的表示形式。UID用于標(biāo)識(shí)系統(tǒng)中的用戶(hù)以及確定用戶(hù)可以訪問(wèn)的系統(tǒng)資源。這就是為什么用戶(hù) ID 應(yīng)該是唯一的。只有標(biāo)識(shí)符是唯一的才能夠更好控制用戶(hù)的權(quán)限。那么下面就來(lái)看下如何查看Linux中用戶(hù)所對(duì)應(yīng)的uid。
AT24C02是IIC接口的EEPROM存儲(chǔ)芯片,這顆芯片非常經(jīng)典,百度搜索可以找到非常多的資料,大多都是51、STM32單片機(jī)的示例代碼,大多采用模擬時(shí)序、裸機(jī)系統(tǒng)運(yùn)行。當(dāng)前文章介紹在Linux
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