參數(shù)資料
型號(hào)： AT24C256CW-SH-B
廠商： ATMEL CORP
元件分類(lèi)： PROM
英文描述： 32K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8
封裝： 0.20 INCH, LEAD AND HALOGEN FREE, PLASTIC, EIAJ, SOIC-8
文件頁(yè)數(shù)： 3/23頁(yè)
文件大?。?/td> 412K
代理商： AT24C256CW-SH-B
AT24C256C
11
8568A–SEEPR–11/08
6.
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 “1”. 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 “1” is clocked in and acknowledged by the EEPROM, the
current address data word is serially clocked out. The microcontroller does not respond with an input “0” but does
generate a following stop condition (refer to Figure 11).
Figure 11.
Current Address Read
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 “0” but does generate a following stop condition. (Refer to
Figure 12.
Random Read
Note:
* = DON’T CARE bit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT24C256C-XHLAU-B 制造商:Atmel Corporation 功能描述:SERIAL EEPROM, 256K (32K X 8), 2-WI - 8 TSSOP, PB/HALO FREE - Bulk
AT24C256C-XHL-B 功能描述:電可擦除可編程只讀存儲(chǔ)器 256K (32K X 8), 2-WI 1.8V RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
AT24C256C-XHL-T 功能描述:電可擦除可編程只讀存儲(chǔ)器 256K (32K X 8), 2-WI 1.8V RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
AT24C256C-XPD-T 制造商:Atmel Corporation 功能描述:SERIAL EEPROM, 256K (32K X 8) - Tape and Reel
AT24C256N-10SC 功能描述:IC EEPROM 256KBIT 1MHZ 8SOIC 制造商:microchip technology 系列:- 包裝:管件 零件狀態(tài):停產(chǎn) 存儲(chǔ)器類(lèi)型:非易失 存儲(chǔ)器格式:EEPROM 技術(shù):EEPROM 存儲(chǔ)容量:256Kb （32K x 8） 時(shí)鐘頻率:1MHz 寫(xiě)周期時(shí)間 - 字，頁(yè):10ms 訪問(wèn)時(shí)間:550ns 存儲(chǔ)器接口:I2C 電壓 - 電源:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C（TA） 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:8-SOIC 基本零件編號(hào):AT24C256 標(biāo)準(zhǔn)包裝:100
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