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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： | 18/22页 |
| 文件大小： | 314K |
| 代理商： | IS24C02B-2ZI |
Integrated Silicon Solution, Inc. — www.issi.com
5
Rev. C
11/28/07
IS24C01B IS24C02B
Page Write
The IS24C01B/02B is capable of 8-byte Page-Write
operation. A Page-Write is initiated in the same manner as
a Byte Write, but instead of terminating the internal Write
cycle after the first data word is transferred, the Master
device can transmit up to 7 more bytes. After the receipt of
each data word, the EEPROM responds immediately with
an ACK on SDA line, and the three lower order data word
address bits are internally incremented by one, while the
higher order bits of the data word address remain constant.
If a byte address is incremented from the last byte of a
page, it returns to the first byte of that page. If the Master
device should transmit more than 8 bytes prior to issuing
the Stop condition, the address counter will “roll over,” and
the previously written data will be overwritten. Once all 8
bytes are received and the Stop condition has been sent by
the Master, the internal programming cycle begins. At this
point, all received data is written to the IS24C01B/02B in a
single Write cycle. All inputs are disabled until completion
of the internal Write cycle.
Acknowledge (ACK) Polling
The disabling of the inputs can be used to take advantage
of the typical Write cycle time. Once the Stop condition
is issued to indicate the end of the host's Write operation,
the IS24C01B/02B initiates the internal Write cycle. ACK
polling can be initiated immediately. This involves issuing
the Start condition followed by the Slave address for a
Write operation. If the EEPROM is still busy with the Write
operation, no ACK will be returned. If the IS24C01B/02B
has completed theWrite operation, an ACK will be returned
and the host can then proceed with the next Read or Write
operation.
WRItE OPERAtIOn
Byte Write
In the Byte Write mode, the Master device sends the Start
condition and the Slave address information (with the R/W
set to Zero) to the Slave device. After the Slave generates
an ACK, the Master sends the byte address that is to be
written into the address pointer of the IS24C01B/02B. After
receiving another ACK from the Slave, the Master device
transmits the data byte to be written into the address
memory location. The IS24C01B/02B acknowledges
once more and the Master generates the Stop condition,
at which time the device begins its internal programming
cycle. While this internal cycle is in progress, the device
willnotrespondtoanyrequestfromtheMasterdevice.
DEVICE ADDRESSInG
The Master begins a transmission by sending a Start
condition. The Master then sends the address of the
particularSlavedevicesitisrequesting.TheSlavedevice
(Fig. 5) address is 8 bits.
The four most significant bits of the Slave device address
are fixed as 1010 for the IS24C01B/02B.
The next three bits of the Slave address are specific for
each of the EEPROM. The bit values enable access to
multiple memory blocks or multiple devices.
The IS24C01B/02B uses the three bits A0, A1, and A2 in
a comparison with the hard-wired input values on the A0,
A1, and A2 pins. Up to eight units may share the 2-wire
bus.
The last bit of the Slave address specifies whether a Read
or Write operation is to be performed. When this bit is set
to 1, a Read operation is selected, and when set to 0, a
Write operation is selected.
After the Master transmits the Start condition and Slave
address byte (Fig. 5), the appropriate 2-wire Slave (eg.
IS24C02B) will respond with ACK on the SDA line. The
Slave will pull down the SDA on the ninth clock cycle,
signaling that it received the eight bits of data.The selected
EEPROM then prepares for a Read or Write operation by
monitoring the bus.
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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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