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參數(shù)資料
| 型號(hào)： | 24AA32A-SM |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 32K 1.8V I 2 C O Serial EEPROM |
| 中文描述： | 32K的1.8VI 2二氧化碳串行EEPROM |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 79K |
| 代理商： | 24AA32A-SM |
1996 Microchip Technology Inc.
Preliminary
DS21162B-page 5
24AA32A
3.6
Device Addressing
A control byte is the first byte received following the
start condition from the master device. The control byte
consists of a 4-bit control code; for the 24AA32A this is
set as 1010 binary for read and write (R/W) operations.
The next three bits of the control byte are the device
select bits (A2, A1, A0). They are used by the master
device to select which of the eight devices are to be
accessed. These bits are in effect the three most signif-
icant 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, 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 3-3). Because only A11...A0 are used, the
upper four address bits must be zeros. The most signif-
icant bit of the most significant byte of the address is
transferred first.
FIGURE 3-2:
CONTROL BYTE
ALLOCATION
R/W
A
1
0
1
0
A2
A1
A0
READ/WRITE
START
SLAVE ADDRESS
Following the start condition, the 24AA32A monitors
the SDA bus checking the device type identifier being
transmitted. Upon receiving a 1010 code and appropri-
ate device select bits, the slave device outputs an
acknowledge signal on the SDA line. Depending on the
state of the R/W bit, the 24AA32A will select a read or
write operation.
Operation
Control
Code
1010
1010
Device Select
R/W
Read
Write
Device Address
Device Address
1
0
FIGURE 3-3:
ADDRESS SEQUENCE BIT ASSIGNMENTS
1
0
1
0
A
2
A
1
A
0
R/W
0
0
0
0
A
11
A
10
A
9
A
7
A
0
A
8
SLAVE
ADDRESS
DEVICE
SELECT
BUS
CONTROL BYTE
ADDRESS BYTE 1
ADDRESS BYTE 0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 24AA32AT/SM | 功能描述:電可擦除可編程只讀存儲(chǔ)器 4kx8 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24AA32AT/SN | 功能描述:電可擦除可編程只讀存儲(chǔ)器 4kx8 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24AA32AT-I/CS16K | 功能描述:電可擦除可編程只讀存儲(chǔ)器 32K 4K X 8 1.8V SERIAL EE IND RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24AA32AT-I/MC | 功能描述:電可擦除可編程只讀存儲(chǔ)器 32K 4KX8 1.8V SER EE IND RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24AA32AT-I/MC-CUT TAPE | 制造商:Microchip 功能描述:24AA32A Series 32 K (4 K X 8) 5.5 V Serial Surface Mount EEPROM - DFN-8 |
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