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参数资料
| 型号： | IS24C02B-2ZI |
| 厂商： | INTEGRATED SILICON SOLUTION INC |
| 元件分类： | PROM |
| 英文描述： | 1K-bit/2K-bit 2-WIRE SERIAL CMOS EEPROM |
| 中文描述： | 256 X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8 |
| 封装： | PLASTIC, MO-153, TSSOP-8 |
| 文件页数： | 19/22页 |
| 文件大小： | 314K |
| 代理商： | IS24C02B-2ZI |
6
Integrated Silicon Solution, Inc. — www.issi.com
Rev. C
11/28/07
IS24C01B IS24C02B
READ OPERAtIOn
Read operations are initiated in the same manner as
Write operations, except that the (R/W) bit of the Slave
address is set to “1”. There are three Read operation
options:currentaddressread,randomaddressreadand
sequentialread.
Current Address Read
The IS24C01B/02B contains an internal address counter
which maintains the address of the last byte accessed,
incremented by one. For example, if the previous operation
is either a Read or Write operation addressed to the
address location n, the internal address counter would
increment to address location n+1. When the EEPROM
receives the Slave Addressing Byte with a Read operation
(R/W bit set to “1”), it will respond an ACK and transmit the
8-bit data byte stored at address location n+1. The Master
should not acknowledge the transfer but should generate
a Stop condition so the IS24C01B/02B discontinues
transmission. If 'n' is the last byte of the memory, the
data from location '0' will be transmitted. (Refer to Figure
8. Current Address Read Diagram.)
Random Address Read
Selective Read operations allow the Master device to select
at random any memory location for a Read operation. The
Master device first performs a 'dummy' Write operation by
sending the Start condition, Slave address and byte address
of the location it wishes to read. After the IS24C01B/02B
acknowledges the byte address, the Master device resends
the Start condition and the Slave address, this time with
the R/W bit set to one. The EEPROM then responds
withitsACKandsendsthedatarequested. TheMaster
device does not send an ACK but will generate a Stop
condition. (Refer to Figure 9. Random Address Read
Diagram.)
Sequential Read
Sequential Reads can be initiated as either a Current
Address Read or Random Address Read. After the
IS24C01B/02Bsendstheinitialbytesequence,theMaster
devicenowrespondswithanACK,indicatingitrequires
additional data from the IS24C01B/02B. The EEPROM
continues to output data for each ACK received. The
MasterdeviceterminatesthesequentialReadoperation
bypullingSDAHigh(noACK)indicatingthelastdataword
to be read, followed by a Stop condition.
Thedataoutputissequential,withthedatafromaddress
n followed by the data from address n+1,n+2 ... etc. The
address counter increments by one automatically, allowing
the entire memory contents to be serially read during
sequentialReadoperation. Whenthememoryaddress
boundary of 127 or 255 (depending on the device) is
reached, the address counter “rolls over” to address 0,
and the device continues to output data. (Refer to Figure
10.SequentialReadDiagram).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IS24C02B-2ZI-TR | 功能描述:电可擦除可编程只读存储器 1.8V 2Kb Industrial Temp RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| IS24C02B-2ZLI | 功能描述:电可擦除可编程只读存储器 1.8V 2Kb Industrial Temp RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| IS24C02B-2ZLI-TR | 功能描述:电可擦除可编程只读存储器 1.8V 2Kb Industrial Temp RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| IS24C02C-2GLI | 功能描述:电可擦除可编程只读存储器 1.8V, 2K (256x8) Industrial Temp RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| IS24C02C-2GLI-TR | 功能描述:电可擦除可编程只读存储器 1.8V, 2K (256x8) Industrial Temp RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
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