参数资料
| 型号： | 24LC08B/ST |
| 厂商： | Microchip Technology |
| 文件页数： | 10/40页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 8KBIT 400KHZ 8TSSOP |
| 产品培训模块： | I2C Serial EEPROM |
| 标准包装： | 100 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 8K (4 x 256 x 8) |
| 速度： | 400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 1446 (CN2011-ZH PDF) |
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24AA08/24LC08B
8.0
READ OPERATION
8.3
Sequential Read
Read operations are initiated in the same way as write
operations, with the exception that the R/W bit of the
slave address is set to ‘ 1 ’. There are three basic types
of read operations: current address read, random read
and sequential read.
Sequential reads are initiated in the same way as a
random read, except that once the 24XX08 transmits
the first data byte, the master issues an acknowledge
as opposed to a Stop condition in a random read. This
directs the 24XX08 to transmit the next sequentially-
addressed 8-bit word ( Figure 8-3 ).
8.1
Current Address Read
To provide sequential reads, the 24XX08 contains an
The 24XX08 contains an address counter that main-
tains the address of the last word accessed, internally
incremented by ‘ 1 ’. Therefore, if the previous access
(either a read or write operation) was to address n , the
next current address read operation would access data
from address n + 1 . Upon receipt of the slave address
with R/W bit set to ‘ 1 ’, the 24XX08 issues an acknowl-
edge and transmits the 8-bit data word. The master will
not acknowledge the transfer, but does generate a Stop
condition and the 24XX08 discontinues transmission
( Figure 8-1 ).
internal Address Pointer that is incremented by one
upon completion of each operation. This Address
Pointer allows the entire memory contents to be serially
read during one operation.
8.4 Noise Protection
The 24XX08 employs a V CC threshold detector circuit
which disables the internal erase/write logic if the V CC
is below 1.5V at nominal conditions.
The SCL and SDA inputs have Schmitt Trigger and
filter circuits which suppress noise spikes to assure
8.2
Random Read
proper device operation, even on a noisy bus.
Random read operations allow the master to access
any memory location in a random manner. To perform
this type of read operation, the word address must first
be set. This is accomplished by sending the word
address to the 24XX08 as part of a write operation.
Once the word address is sent, the master generates a
Start condition following the acknowledge. This
terminates the write operation, but not before the
internal Address Pointer is set. The master then issues
the control byte again, but with the R/W bit set to a ‘ 1 ’.
The 24XX08 will then issue an acknowledge and trans-
mit the 8-bit data word. The master will not acknowl-
edge the transfer, but does generate a Stop condition
and the 24XX08 will discontinue transmission
( Figure 8-2 ).
FIGURE 8-1:
CURRENT ADDRESS READ
Bus Activity
Master
S
T
A
R
T
Control
Byte
Data (n)
S
T
O
P
SDA Line
S 1 0 1 0 x B1 B0 1
P
Bus Activity
x = “don’t care”
DS21710K-page 10
Block
Select
Bits
A
C
K
N
o
A
C
K
? 2002-2012 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 24LC08BT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8K I2C? Serial EEPROM |
| 24LC08BT-/SL | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
| 24LC08BT-/SM | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
| 24LC08BT/SN | 功能描述:电可擦除可编程只读存储器 1kx8 - 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 |
| 24LC08BT-/SN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
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