Figure 4-5.
Start and Stop Definition
SDA
SCL
START
STOP
Figure 4-6.
Output Acknowledge
SCL
1
8
9
DATA IN
DATA OUT
START
ACKNOWLEDGE
5. Device Addressing
The 1024K EEPROM requires an 8-bit device address word following a start condition to enable
the chip for a read or write operation (see Figure 7-1 on page 11 ). The device address word con-
sists of a mandatory one, zero sequence for the first four most significant bits as shown. This is
common to all two-wire EEPROM devices.
The 1024K uses the two device address bit, A1, A2, to allow up to four devices on the same bus.
These A1, A2 bits must compare to the corresponding hardwired input pins. The A1, A2 pin uses
an internal proprietary circuit that biases it to a logic low condition if the pin is allowed to float.
The seventh bit (P 0 ) of the device address is a memory page address bit. This memory page
address bit is the most significant bit of the data word address that follows. The eighth bit of the
device address is the read/write operation select bit. A read operation is initiated if this bit is high
and a write operation is initiated if this bit is low.
Upon a compare of the device address, the EEPROM will output a zero. If a compare is not
made, the device will return to a standby state.
8
AT24C1024B
5194F–SEEPR–1/08
相关PDF资料
AT24C1024Y4-10YU-2.7 IC EEPROM 1MBIT 1MHZ 8SAP
AT24C11Y1-10YU-1.8 IC EEPROM 1KBIT 1MHZ 8MAP
AT24C128BY6-YH-T IC EEPROM 128KBIT 1MHZ 8DFN
AT24C128C-XHM-B IC EEPROM 128KBIT 400KHZ 8TSSOP
AT24C128Y1-10YU-1.8 IC EEPROM 128KBIT 400KHZ 8MAP
AT24C164-10SU-1.8 IC EEPROM 16KBIT 1MHZ 8SOIC
AT24C16AY6-10YH-1.8 IC EEPROM 16KBIT 400KHZ 8DFN
AT24C16BY6-YH-T IC EEPROM 16KBIT 1MHZ 8DFN
相关代理商/技术参数
AT24C1024B-TH25-T 功能描述:电可擦除可编程只读存储器 8-EIAJ 2.5V NiPdAu 2.5V 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
AT24C1024B-TH-B 功能描述:电可擦除可编程只读存储器 1.8V - NiPdAu 1.8V 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
AT24C1024B-TH-T 功能描述:电可擦除可编程只读存储器 1.8V - NiPdAu 1.8V 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
AT24C1024BU4-UU-T 功能描述:电可擦除可编程只读存储器 1.8V - 8-dBGA2 1.8V 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
AT24C1024B-W-11 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Two-wire Serial EEPROM 1M (131,072 x 8)
AT24C1024BW-SH25-B 功能描述:电可擦除可编程只读存储器 1024K 2-WIRE 131072 x 8 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
AT24C1024BW-SH25-T 功能描述:电可擦除可编程只读存储器 8-EIAJ 2.5V 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
AT24C1024BW-SH25-T 制造商:Atmel Corporation 功能描述:Serial EEPROM IC