參數資料
型號： M24128-BRMN6TG
廠商： 意法半導體
元件分類： DRAM
英文描述： 256Kbit and 128Kbit Serial I2C Bus EEPROM With Three Chip Enable Lines
中文描述： 256Kbit和128Kbit的EEPROM串行I2C總線具有三個芯片使能線
文件頁數： 4/17頁
文件大小： 135K
代理商： M24128-BRMN6TG
M24256, M24128
4/17
must be stable during the clock low-to-high transi-
tion, and the data must change onlywhen the SCL
line is low.
Memory Addressing
To start communication between the bus master
and the slave memory, the master must initiate a
START condition. Following this, the master sends
the 8-bit byte, shown in Table 3, on the SDA bus
line (most significant bit first). This consists of the
7-bit Device Select Code, and the 1-bit Read/Write
Designator (RW). The Device Select Code is fur-
ther subdivided into: a 4-bit Device Type Identifier,
and a 3-bit Chip Enable “Address” (0, 0, 0).
To address the memory array, the 4-bit Device
Type Identifier is 1010b.
The 8
th
bit is the RW bit. This is set to ‘1’ for read
and ‘0’ for write operations. If a match occurs on
the Device Select Code, the corresponding mem-
ory gives an acknowledgment on the SDA bus dur-
ing the 9
th
bit time. If the memory does not match
the Device Select Code, it deselects itself from the
bus, and goes into stand-by mode.
Figure 4. I
2
C Bus Protocol
SCL
SDA
SCL
SDA
SDA
START
Condition
SDA
Input
SDA
Change
AI00792B
STOP
Condition
1
2
3
7
8
9
MSB
ACK
START
Condition
SCL
1
2
3
7
8
9
MSB
ACK
STOP
Condition
Table 3. Device Select Code
1
Note: 1. The most significant bit, b7, is sent first.
Device Type Identifier
Chip Enable
RW
b7
b6
b5
b4
b3
b2
b1
b0
Device Select Code
1
0
1
0
0
0
0
RW
相關PDF資料
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M24128-BRMN6T 256Kbit and 128Kbit Serial I2C Bus EEPROM With Three Chip Enable Lines
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相關代理商/技術參數
參數描述
M24128-BRMN6TP 功能描述:電可擦除可編程只讀存儲器 128 Kbit 64 Kbit and 32 Kbit serial RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數據保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8
M24128-BRMW6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256Kbit and 128Kbit Serial I2C Bus EEPROM With Three Chip Enable Lines
M24128-BRMW6G 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256Kbit and 128Kbit Serial I2C Bus EEPROM With Three Chip Enable Lines
M24128-BRMW6P 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256Kbit and 128Kbit Serial I2C Bus EEPROM With Three Chip Enable Lines
M24128-BRMW6T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256Kbit and 128Kbit Serial I2C Bus EEPROM With Three Chip Enable Lines
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