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參數(shù)資料
| 型號： | ST24FC21BM1TR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY |
| 中文描述： | 1千位x8雙模式串行EEPROM的韋莎插頭 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大?。?/td> | 159K |
| 代理商： | ST24FC21BM1TR |
the SDA signal must be stable during the clock low
to high transition and the data must change ONLY
when the SCL line is low.
Memory Addressing.
To start communication be-
tween the bus master and the slave ST24xy21, the
master must initiate a START condition. Following
this, the master sends onto the SDA bus line 8 bits
(MSB first) corresponding to the Device Select
code (7 bits) and a READ or WRITE bit. The 4 most
significant bits of the Device Select code are the
device type identifier, corresponding to the I
2
C bus
definition. For these memories the 4 bits are fixed
as 1010b. The 8th bit sent is the read or write bit
(RW), this bit is set to ’1’ for read and ’0’ for write
operations. If a match is found, the corresponding
memory will acknowledge the identification on the
SDA bus during the 9th bit time.
Write Operations
Following a START condition the master sends a
Device Select code with the RW bit set to ’0’. The
memory acknowledges this and waits for a byte
address. After receipt of the byte address the de-
vice again responds with an acknowledge.
In I
2
C bidirectional mode, any write command with
VCLK=0 (for the ST24LC21B and ST24FC21,
ST24FC21B) or with WC=0 (for the ST24LW21 and
ST24FW21) will not modify data and will be ac-
knowledged on data bytes, as shown in Figure 12.
Byte Write
. In the Byte Write mode the master
sends one data byte, which is acknowledged by the
WRITE Cycle
in Progress
AI01099B
Next
Operation is
Addressing the
Memory
START Condition
DEVICE SELECT
with RW = 0
ACK
Returned
YES
NO
YES
NO
ReSTART
STOP
Proceed
WRITE Operation
Proceed
Random Address
READ Operation
Send
Byte Address
First byte of instruction
with RW = 0 already
decoded by ST24xxx
Figure 10. Write Cycle Polling using ACK
14/22
ST24LC21B, ST24LW21, ST24FC21, ST24FC21B, ST24FW21
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST24FC21BM6TR | 1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY |
| ST24LC21B | Controller IC; Package/Case:14-DIP; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Mounting Type:Through Hole |
| ST24LC21BM1TR | IC,SMPS CONTROLLER,CURRENT-MODE,BCDMOS,SOP,14PIN,PLASTIC |
| ST24LC21BM6TR | Switchmode Controller IC; Package/Case:14-SOIC; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes; Mounting Type:Surface Mount |
| ST24LC21BB1TR | 1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST24FC21BM6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY |
| ST24FC21M1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| ST24FC21M1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY |
| ST24FC21M6 | 功能描述:電可擦除可編程只讀存儲(chǔ)器 Dual Mode 1K (128x8) 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 |
| ST24FC21M6TR | 功能描述:電可擦除可編程只讀存儲(chǔ)器 Dual Mode 1K (128x8) 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 |
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