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5. Device Operation
CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device.
Data on the SDA pin may change only during SCL low time periods (see Figure 7-2 on page 8 ).
Data changes during SCL high periods will indicate a start or stop condition as defined below.
START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which
must precede any other command (see Figure 7-3 on page 8 ).
STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition. After a
read sequence, the stop command will place the EEPROM in a standby power mode (see Fig-
ure 7-3 on page 8 ).
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the
EEPROM in 8-bit words. The EEPROM sends a zero to acknowledge that it has received each
word. This happens during the ninth clock cycle.
STANDBY MODE: The AT24C16B features a low-power standby mode which is enabled: (a)
upon power-up and (b) after the receipt of the STOP bit and the completion of any internal
operations.
2-WIRE SOFTWARE RESET: After an interruption in protocol, power loss or system reset, any
2-wire part can be protocol reset by following these steps:
1. Create a start bit condition.
2. Clock 9 cycles.
3. Create another start bit followed by stop bit condition as shown below.
Start bit
Dummy Clock Cycles
Start bit
Stop bit
SCL
1
2
3
8
9
SDA
6
AT24C16B
5175E–SEEPR–3/09
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相关代理商/技术参数
AT24C16C-CUM-T 制造商:Atmel Corporation 功能描述:
AT24C16C-MAHM-T 功能描述:电可擦除可编程只读存储器 SERIAL 电可擦除可编程只读存储器 16K (2K X 8) 2-WIRE 1.7V 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
AT24C16C-MEHM-T 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:I2C-Compatible, (2-Wire) Serial EEPROM
AT24C16C-PUM 功能描述:电可擦除可编程只读存储器 SERIAL 电可擦除可编程只读存储器 16K (2K X 8) 2-WIRE 1.7V 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
AT24C16C-SSHM-B 功能描述:电可擦除可编程只读存储器 SERIAL 电可擦除可编程只读存储器 16K (2K X 8) 2-WIRE 1.7V 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
AT24C16C-SSHM-T 功能描述:电可擦除可编程只读存储器 SERIAL 电可擦除可编程只读存储器 16K (2K X 8) 2-WIRE 1.7V 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
AT24C16C-SSPD-T 制造商:Atmel Corporation 功能描述:
AT24C16C-STUM-T 功能描述:电可擦除可编程只读存储器 SERIAL 电可擦除可编程只读存储器 16K (2K X 8) 2-WIRE 1.7V 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