参数资料
| 型号： | 34LC02T-E/MS |
| 厂商： | Microchip Technology |
| 文件页数： | 7/36页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 2KBIT 1MHZ 8MSOP |
| 标准包装： | 2,500 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 2K (256 x 8) |
| 速度： | 1MHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.2 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页当前第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页
34AA02/34LC02
FIGURE 3-1:
DATA TRANSFER SEQUENCE ON THE SERIAL BUS
(A)
(B)
(D)
(D)
(C)
(A)
SCL
SDA
Start
Condition
Address or
Acknowledge
Valid
Data
Allowed
to Change
Stop
Condition
3.6
Device Addressing
FIGURE 3-2:
CONTROL BYTE
A control byte is the first byte received following the
ALLOCATION
Start condition from the master device. The first part of
the control byte consists of a 4-bit control code which is
set to ‘ 1010 ’ for normal read and write operations and
‘ 0110 ’ for writing to the write-protect register. The
control byte is followed by three Chip Select bits (A2,
A1, A0). The Chip Select bits allow the use of up to
Start
Slave Address
Read/Write
R/W A
eight 34XX02 devices on the same bus and are used to
1
0
1
0
A2
A1
A0
determine which device is accessed. The Chip Select
bits in the control byte must correspond to the logic lev-
els on the corresponding A2, A1 and A0 pins for the
OR
device to respond.
0
1
1
0
A2
A1
A0
For the SOT-23 package, the A2 pin is not connected.
During device addressing, the A2 Chip Select bit
( Figure 3-2 ) should be set to ‘ 0 ’. Only four 34XX02
SOT-23 packages can be connected to the same bus.
The eighth bit of slave address determines if the master
4.0
4.1
WRITE OPERATIONS
Byte Write
device wants to read or write to the 34XX02
( Figure 3-2 ). When set to a one, a read operation is
selected. When set to a zero, a write operation is
selected.
Following the Start signal from the master, the device
code(4 bits), the Chip Select bits (3 bits) and the R/W
bit, which is a logic low, are placed onto the bus by the
master transmitter. This indicates to the addressed
Operation
Read
Write
Write-Protect Register
Control
Code
1010
1010
0110
Chip
Select
A2 A1 A0
A2 A1 A0
A2 A1 A0
R/W
1
0
0
slave receiver that a byte with a word address will follow,
once it has generated an Acknowledge bit during the
ninth clock cycle. Therefore, the next byte transmitted
by the master is the word address and will be written
into the Address Pointer of the 34XX02.
After receiving another Acknowledge signal from the
34XX02, the master device will transmit the data word
to be written into the addressed memory location. The
34XX02 acknowledges again and the master generates
a Stop condition. This initiates the internal write cycle,
which means that during this time, the 34XX02 will not
generate Acknowledge signals ( Figure 4-1 ). If an
attempt is made to write to the array when the software
or hardware write protection has been enabled, the
device will acknowledge the command, but no data will
be written. The write cycle time must be observed even
if the write protection is enabled.
? 2011 Microchip Technology Inc.
DS22029F-page 7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 34LC02T-I | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2K I2C Serial EEPROM Software Write-Protect |
| 34LC02T-I/MC | 功能描述:电可擦除可编程只读存储器 2K 256 X 8 25V SERIAL EE IND 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 |
| 34LC02T-I/MNY | 功能描述:电可擦除可编程只读存储器 2K 256X8 2.5V SERIAL EE IND 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 |
| 34LC02T-I/MS | 功能描述:电可擦除可编程只读存储器 2K 256 X 8 25V SERIAL EE IND 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 |
| 34LC02T-I/OT | 功能描述:电可擦除可编程只读存储器 2K 256X8 2.5V SERIAL EE IND 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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