参数资料
| 型号： | 24FC1025T-I/SN |
| 厂商： | Microchip Technology |
| 文件页数： | 8/28页 |
| 文件大小： | 0K |
| 描述： | EEPROM 1024K I2C 1MHZ 8SOIC |
| 标准包装： | 1 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 1M (128K x 8) |
| 速度： | 400kHz，1MHz |
| 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（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 标准包装 |
| 其它名称： | 24FC1025T-I/SNDKR |
第1页第2页第3页第4页第5页第6页第7页当前第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
24AA1025/24LC1025/24FC1025
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
24XX1025, this is set as ‘ 1010 ’ binary for read and
write operations. The next bit of the control byte is the
Control Code
Block
Select
Bits
Chip
Select
Bits
block select bit (B0). This bit acts as the A16 address
bit for accessing the entire array. The next two bits of
the control byte are the Chip Select bits (A1, A0). The
S
1
0
1
0
B0
A1
A0 R/W ACK
Chip Select bits allow the use of up to four 24XX1025
devices on the same bus and are used to select which
Slave Address
device is 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 (MSb) of the word address.
The last bit of the control byte defines the operation to
Start Bit
5.1
Acknowledge Bit
Contiguous Addressing Across
Multiple Devices
be performed. When set to a one, a read operation is
selected, and when set to a zero, a write operation is
selected. The next two bytes received define the
address of the first data byte ( Figure 5-2 ). The upper
address bits are transferred first, followed by the Least
Significant bits (LSb).
Following the Start condition, the 24XX1025 monitors
the SDA bus checking the device type identifier being
transmitted. Upon receiving a ‘ 1010 ’ code and
appropriate device select bits, the slave device outputs
an Acknowledge signal on the SDA line. Depending on
the state of the R/W bit, the 24XX1025 will select a read
or write operation.
This device has an internal addressing boundary
limitation that is divided into two segments of 512K bits.
Block select bit ‘B0’ to control access to each segment.
The Chip Select bits A1 and A0 can be used to expand
the contiguous address space for up to 4 Mbit by add-
ing up to four 24XX1025’s on the same bus. In this
case, software can use A0 of the control byte as
address bit A17 and A1 as address bit A18. It is not
possible to sequentially read across device boundar-
ies.
Each device has internal addressing boundary
limitations. This divides each part into two segments of
512K bits. The block select bit ‘B0’ controls access to
each “half”.
Sequential read operations are limited to 512K 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
0 R/W
1
0
1
0
B
0
A
1
A
A A A A A A
15 14 13 12 11 10
A
9
A
8
A
7
?
?
?
?
?
?
A
0
Control
Code
DS21941K-page 8
Block Chip
Select Select
Bit Bits
X = “don’t care” bit
? 2005-2012 Microchip Technology Inc.
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| 24FC1026 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1024K I2C? CMOS Serial EEPROM 100 kHz and 400 kHz Clock Compatibility |
| 24FC1026-I/P | 功能描述:电可擦除可编程只读存储器 1024K 128K X 8 2.5V HI-SPD EE 128BYTE PG 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 |
| 24FC1026-I/SM | 功能描述:电可擦除可编程只读存储器 1024K 128K X 8 2.5V HI-SPD EE 128BYTE PG 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 |
| 24FC1026-I/SN | 功能描述:电可擦除可编程只读存储器 1024K 128K X 8 2.5V HI-SPD EE 128BYTE PG 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 |
| 24FC1026-I/ST | 功能描述:电可擦除可编程只读存储器 1024K 128K X 8 2.5V HI-SP SER EE 128BYTE 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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