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参数资料
| 型号： | 24AA01T-I/OT |
| 厂商： | Microchip Technology |
| 文件页数： | 8/34页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 1KBIT 400KHZ SOT23-5 |
| 产品培训模块： | I2C Serial EEPROM |
| 标准包装： | 1 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 1K (128 x 8) |
| 速度： | 100kHz，400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1444 (CN2011-ZH PDF) |
| 其它名称： | 24AA01T-I/OTDKR |
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24AA01/24LC01B
6.0
WRITE OPERATION
6.2
Page Write
6.1
Byte Write
The write control byte, word address and first data byte
are transmitted to the 24XX01 in the same way as in a
Following the Start condition from the master, the
device code (4 bits), the block address (3 bits, “don’t
cares”) and the R/W bit, which is a logic-low, is placed
onto the bus by the master transmitter. This indicates to
the addressed slave receiver that a byte with a word
address will follow after it has generated an Acknowl-
edge 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
24XX01. After receiving another Acknowledge signal
from the 24XX01, the master device will transmit the
data word to be written into the addressed memory
location. The 24XX01 acknowledges again and the
master generates a Stop condition. This initiates the
byte write. However, instead of generating a Stop
condition, the master transmits up to 8 data bytes to the
24XX01, which are temporarily stored in the on-chip
page buffer and will be written into the memory once
the master has transmitted a Stop condition. Upon
receipt of each word, the four lower-order Address
Pointer bits are internally incremented by ‘ 1 ’. The
higher-order 7 bits of the word address remain
constant. If the master should transmit more than 8
words prior to generating the Stop condition, the
address counter will roll over and the previously
received data will be overwritten. As with the byte write
operation, once the Stop condition is received, an
internal write cycle will begin (Figure 6-2).
internal write cycle, and, during this time, the 24XX01
will not generate Acknowledge signals (Figure 6-1).
Note:
6.3
Page write operations are limited to writing
bytes within a single physical page
regardless of the number of bytes
actually being written. Physical page
boundaries start at addresses that are
integer multiples of the page buffer size (or
‘page size’) and end at addresses that are
integer multiples of [page size – 1]. If a
page write command attempts to write
across a physical page boundary, the
result is that the data wraps around to the
beginning of the current page (overwriting
data previously stored there), instead of
being written to the next page, as might be
expected. It is therefore necessary for the
application software to prevent page write
operations that would attempt to cross a
page boundary.
Write Protection
The WP pin allows the user to write-protect the entire
array (00-7F) when the pin is tied to V CC . If tied to V SS ,
the write protection is disabled.
FIGURE 6-1:
BYTE WRITE
Bus Activity
Master
S
T
A
R
T
Control
Byte
Word
Address
Data
S
T
O
P
SDA Line
S
1 0
1 0
x x
x 0
P
Bus Activity
x = “don’t care”
Block
Select
Bits
A
C
K
A
C
K
A
C
K
DS21711J-page 8
? 2009 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 24AA02 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2K I2C Serial EEPROM |
| 24AA02/P | 功能描述:电可擦除可编程只读存储器 256x8 - 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 |
| 24AA02-/P | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
| 24AA02-/SM | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
| 24AA02/SN | 功能描述:电可擦除可编程只读存储器 256x8 - 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 |
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