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M34E04B Datasheet(PDF) 21 Page - STMicroelectronics

Part # M34E04B
Description  4-Kbit Serial Presence Detect EEPROM compatible
PDF  35 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M34E04B Datasheet(HTML) 21 Page - STMicroelectronics

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M34E04B
Use within a DDR4 DRAM module
34
Table 4. Acknowledge when writing data or defining the write-protection status (instructions
with R/W bit = 0)
Status
Instruction
Ack
Address
Ack
Data byte
Ack
Write cycle
(tW)
Protected
SWPn
NoAck Not significant NoAck
Not significant
NoAck
No
CWP
Ack
Not significant
Ack
Not significant
Ack
Yes
Page or byte write
in protected block
Ack
Address
Ack
Data
NoAck
No
Not Protected
SWPn or CWP
Ack
Not significant
Ack
Not significant
Ack
Yes
Page or byte write
Ack
Address
Ack
Data
Ack
Yes
Table 5. Acknowledge when reading the protection status (instructions with
R/W bit = 1)
SWPn Status
Instruction
Ack
Address
Ack
Data byte
Ack
Set
RPSn
NoAck
Not significant
NoAck
Not significant
NoAck
Not set
RPSn
Ack
Not significant
NoAck
Not significant
NoAck



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