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參數(shù)資料
| 型號： | AT24C128W-10SU-2.7 |
| 廠商： | ATMEL CORP |
| 元件分類： | DRAM |
| 英文描述： | Two-wire Serial EEPROMs |
| 中文描述： | 16K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8 |
| 封裝： | 0.209 INCH, GREEN, PLASTIC, EIAJ, SOIC-8 |
| 文件頁數(shù)： | 11/23頁 |
| 文件大?。?/td> | 388K |
| 代理商： | AT24C128W-10SU-2.7 |
11
AT24C128/256
0670S–SEEPR–5/06
Read
Operations
Read operations are initiated the same way as write operations with the exception that the
read/write select bit in the device address word is set to one. There are three read operations:
current address read, random address read and sequential read.
CURRENT ADDRESS READ:
The internal data word address counter maintains the last
address accessed during the last read or write operation, incremented by one. This address
stays valid between operations as long as the chip power is maintained. The address “roll
over” during read is from the last byte of the last memory page, to the first byte of the first
page.
Once the device address with the read/write select bit set to one is clocked in and acknowl-
edged by the EEPROM, the current address data word is serially clocked out. The
microcontroller does not respond with an input zero but does generate a following stop condi-
tion (see Figure 10 on page 12).
RANDOM READ:
A random read requires a “dummy” byte write sequence to load in the data
word address. Once the device address word and data word address are clocked in and
acknowledged by the EEPROM, the microcontroller must generate another start condition.
The microcontroller now initiates a current address read by sending a device address with the
read/write select bit high. The EEPROM acknowledges the device address and serially clocks
out the data word. The microcontroller does not respond with a zero but does generate a fol-
lowing stop condition (see Figure 11 on page 12).
SEQUENTIAL READ:
Sequential reads are initiated by either a current address read or a ran-
dom address read. After the microcontroller receives a data word, it responds with an
acknowledge. As long as the EEPROM receives an acknowledge, it will continue to increment
the data word address and serially clock out sequential data words. When the memory
address limit is reached, the data word address will “roll over” and the sequential read will con-
tinue. The sequential read operation is terminated when the microcontroller does not respond
with a zero but does generate a following stop condition (see Figure 12 on page 12).
Figure 7.
Device Address
Figure 8.
Byte Write
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT24C128-W2.7-11 | Two-wire Serial EEPROMs |
| AT24C128Y1-10YU-1.8 | Two-wire Serial EEPROMs |
| AT24C128Y4-10YU-1.8 | Two-wire Serial EEPROMs |
| AT24C128B | Two-wire Serial EEPROM |
| AT24C128 | 128K 2-wire Serial EEPROMs(128K 2線串行EEPROM) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT24C128-W2.7-11 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Two-wire Serial EEPROMs |
| AT24C128WSC | 制造商:Atmel Corporation 功能描述: |
| AT24C128Y1-10YI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:2-wire Serial EEPROMs |
| AT24C128Y1-10YI-1.8 | 功能描述:IC EEPROM 128KBIT 400KHZ 8MAP RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:96 系列:- 格式 - 存儲器:閃存 存儲器類型:FLASH 存儲容量:16M（2M x 8，1M x 16） 速度:70ns 接口:并聯(lián) 電源電壓:2.65 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 封裝/外殼:48-TFSOP（0.724"，18.40mm 寬） 供應商設(shè)備封裝:48-TSOP 包裝:托盤 |
| AT24C128Y1-10YI-2.7 | 功能描述:電可擦除可編程只讀存儲器 128/256K 2-Wire Bus RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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