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參數(shù)資料
| 型號： | 24AA52TISTG |
| 廠商： | Microchip Technology Inc. |
| 元件分類： | EEPROM |
| 英文描述： | 2K 2.2V I2C Serial EEPROM with Software Write-Protect |
| 中文描述： | 2K 2.2伏的I2C串行EEPROM與軟件寫保護 |
| 文件頁數(shù)： | 6/22頁 |
| 文件大小： | 254K |
| 代理商： | 24AA52TISTG |
24AA024/24LC024/24AA025/24LC025
DS21210G-page 6
2004 Microchip Technology Inc.
5.0
DEVICE ADDRESSING
A control byte is the first byte received following the
Start condition from the master device (Figure 5-1).
The control byte consists of a four-bit control code. For
the 24AA024/24LC024/24AA025/24LC025, this is set
as ‘
1010
’ binary for read and write operations. The next
three bits of the control byte are the Chip Select bits
(A2, A1, A0). The Chip Select bits allow the use of up
to
eight
24AA024/24LC024/24AA025/24LC025
devices on the same bus and are used to select which
device is accessed. The Chip Select bits in the control
byte must correspond to the logic levels on the corre-
sponding A2, A1 and A0 pins for the device to respond.
These bits are in effect the three Most Significant bits of
the word address.
The last bit of the control byte defines the operation to
be performed. When set to a one, a read operation is
selected. When set to a zero, a write operation is
selected. Following the Start condition, the 24AA024/
24LC024/24AA025/24LC025 monitors the SDA bus
checking the control byte being transmitted. Upon
receiving a ‘
1010
’ code and appropriate Chip Select
bits, the slave device outputs an Acknowledge signal
on the SDA line. Depending on the state of the R/W bit,
the 24AA024/24LC024/24AA025/24LC025 will select a
read or write operation.
FIGURE 5-1:
CONTROL BYTE FORMAT
5.1
Contiguous Addressing Across
Multiple Devices
The Chip Select bits A2, A1 and A0 can be used to
expand the contiguous address space for up to 16K bits
by adding up to eight 24AA024/24LC024/24AA025/
24LC025 devices on the same bus. In this case, soft-
ware can use A0 of the control byte as address bit A8,
A1 as address bit A9 and A2 as address bit A10. It is
not possible to sequentially read across device
boundaries.
1
0
1
0
A2
A1
A0
S
ACK
R/W
Control Code
Chip Select
Bits
Slave Address
Acknowledge Bit
Start Bit
Read/Write Bit
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 24AA64/P | 功能描述:電可擦除可編程只讀存儲器 8kx8 - 1.8V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)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 |
| 24AA64/S15K | 制造商:Microchip Technology Inc 功能描述:64K, 8K X 8, 1.8V SER EE, DIE IN WAFFLE PK - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24AA64/SM | 功能描述:電可擦除可編程只讀存儲器 8kx8 - 1.8V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)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 |
| 24AA64/SN | 功能描述:電可擦除可編程只讀存儲器 8kx8 - 1.8V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)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 |
| 24AA64-E/MS | 功能描述:電可擦除可編程只讀存儲器 64K, 8Kx8, 1.8V SER EE, ExT RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)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 |
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