參數(shù)資料
型號： M34E02-FDW1T
廠商： 意法半導(dǎo)體
英文描述： 2 Kbit Serial IC Bus EEPROM Serial Presence Detect for DDR2 DIMMs
中文描述： 2千位串行總線的EEPROM芯片串行存在檢測的DDR2內(nèi)存
文件頁數(shù)： 10/23頁
文件大?。?/td> 144K
代理商： M34E02-FDW1T
M34E02
10/23
Figure 9. Write Cycle Polling Flowchart using ACK
Minimizing System Delays by Polling On ACK
During the internal Write cycle, the device discon-
nects itself from the bus, and writes a copy of the
data from its internal latches to the memory cells.
The maximum Write time (t
w
) is shown in Table
12, but the typical time is shorter. To make use of
this, a polling sequence can be used by the bus
master.
The sequence, as shown in Figure 9, is:
– Initial condition: a Write cycle is in progress.
– Step 1: the bus master issues a Start condition
followed by a Device Select Code (the first byte
of the new instruction).
– Step 2: if the device is busy with the internal
Write cycle, no Ack will be returned and the bus
master goes back to Step 1. If the device has
terminated the internal Write cycle, it responds
with an Ack, indicating that the device is ready
to receive the second part of the instruction (the
first byte of this instruction having been sent
during Step 1).
WRITE Cycle
in Progress
AI01847C
Next
Operation is
Addressing the
Memory
START Condition
DEVICE SELECT
with RW = 0
ACK
Returned
YES
NO
YES
NO
ReSTART
STOP
DATA for the
WRITE Operation
DEVICE SELECT
with RW = 1
Send Address
and Receive ACK
First byte of instruction
with RW = 0 already
decoded by the device
YES
NO
START
Condition
Continue the
WRITE Operation
Continue the
Random READ Operation
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M34E02-FDW1TG 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit Serial IC Bus EEPROM Serial Presence Detect for DDR2 DIMMs
M34E02-FDW1TP 功能描述:電可擦除可編程只讀存儲器 2Kbit Serial EE 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
M34E02-FDW6G 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit serial presence detect (SPD) EEPROM for double data rate (DDR1 and DDR2) DRAM modules
M34E02-FDW6P 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit serial presence detect (SPD) EEPROM for double data rate (DDR1 and DDR2) DRAM modules
M34E02-FDW6TG 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit serial presence detect (SPD) EEPROM for double data rate (DDR1 and DDR2) DRAM modules
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