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参数资料
| 型号： | 24AA515T-I/SM |
| 厂商： | Microchip Technology |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 512KBIT 400KHZ 8SOIC |
| 产品培训模块： | I2C Serial EEPROM |
| 标准包装： | 2,100 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 512K (64K x 8) |
| 速度： | 100kHz，400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 8-SOIJ |
| 包装： | 带卷 (TR) |
| 其它名称： | 24AA515TI/SM |
24AA515/24LC515/24FC515
5.0
DEVICE ADDRESSING
FIGURE 5-1:
CONTROL BYTE
A control byte is the first byte received following the
Start condition from the master device (Figure 5-1).
FORMAT
Read/Write Bit
The control byte consists of a 4-bit control code; for the
24XX515, this is set as ‘ 1010 ’ binary for read and write
operations. The next bit of the control byte is the block
Control Code
Block
Select
Bit
Chip
Select
Bits
select bit (B0). This bit acts as the A15 address bit for
accessing the entire array. The next two bits of the
control byte are the Chip Select bits (A1, A0). The Chip
S
1
0
1
0
B0
A1
A0 R/W ACK
Select bits allow the use of up to four 24XX515 devices
on the same bus and are used to select which device is
Slave Address
accessed. The Chip Select bits in the control byte must
correspond to the logic levels on the corresponding A1
and A0 pins for the device to respond. These bits are in
effect the two Most Significant bits of the word address.
Start Bit
5.1
Acknowledge Bit
Contiguous Addressing Across
The last bit of the control byte defines the operation to
be performed. When set to a ‘ 1 ’, a read operation is
selected, and when set to a ‘ 0 ’, a write operation is
selected. The next two bytes received define the
address of the first data byte (Figure 5-2). Because
only A14…A0 are used, the upper address bit is a
“don’t care.” The upper address bits are transferred
first, followed by the Less Significant bits.
Following the Start condition, the 24XX515 monitors
the SDA bus checking the device type identifier being
transmitted. Upon receiving a ‘ 1010 ’ code and appro-
priate device select bits, the slave device outputs an
Acknowledge signal on the SDA line. Depending on the
state of the R/W bit, the 24XX515 will select a read or
write operation.
This device has an internal addressing boundary
limitation that is divided into two segments of 256K bits.
Block select bit ‘B0’ is used in place of address bit
location ‘A15’ to control access to each segment.
Multiple Devices
The Chip Select bits A1, A0 can be used to expand the
contiguous address space for up to 2 Mbit by adding up
to four 24XX515’s on the same bus. In this case,
software can use A0 of the control byte as address bit
A16 and A1 as address bit A17. It is not possible to
sequentially read across device boundaries.
Each device has internal addressing boundary
limitations. This divides each part into two segments of
256K bits. The block select bit ‘B0’ controls access to
each “half” rather than address bit location A15.
Sequential read operations are limited to 256K blocks.
To read through four devices on the same bus, eight
random Read commands must be given.
FIGURE 5-2:
ADDRESS SEQUENCE BIT ASSIGNMENTS
Control Byte
Address High Byte
Address Low Byte
1
0
1
0
B
0
A
1
A
0 R/W
x
A A A A A
14 13 12 11 10
A
9
A
8
A
7
?
?
?
?
?
?
A
0
Control
Block
Chip
Code
Select
Bit
Select
Bits
X = “don’t care” bit
? 2008 Microchip Technology Inc.
DS21673G-page 7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 24AA52-I/MC | 功能描述:电可擦除可编程只读存储器 256x8 - 2.5V Industrial Temp 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 |
| 24AA52-I/MCG | 功能描述:电可擦除可编程只读存储器 256x8 - 2.5V Industrial Temp 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 |
| 24AA52-I/MS | 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 |
| 24AA52-I/MSG | 功能描述:电可擦除可编程只读存储器 256x8 - 1.8V Lead Free Package 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 |
| 24AA52-I/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 |
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