mt18vdvf6472d Micron Semiconductor Products, mt18vdvf6472d Datasheet - Page 34

• Manufacturer Part Number: mt18vdvf6472d
• Description: Ddr Sdram Vlp Registered Dimm
• Manufacturer: Micron Semiconductor Products

Table 17:
Table 18:
Figure 15:
PDF: 09005aef81c73825/Source: 09005aef81c73837
DVF18C64_128x72D_2.fm - Rev. A 8/05 EN
Select Code
Mode
Memory Area Select Code (two arrays)
Protection Register Select Code
Current Address Read
Random Address Read
Sequential Read
Byte Write
Page Write
SDA OUT
SDA IN
SCL
EEPROM Device Select Code
The most significant bit (b7) is sent first
EEPROM Operating Modes
SPD EEPROM Timing Diagram
t SU:STA
RW Bit
t F
1
0
1
1
0
0
t HD:STA
t LOW
t AA
V
V
V
V
IH
IH
IH
IH
WC
V
V
or V
or V
or V
or V
IL
IL
b7
IL
IL
IL
IL
t HIGH
1
0
DEVICE TYPE IDENTIFIER
t HD:DAT
512MB, 1GB: (x72, DR) 184-Pin DDR VLP RDIMM
Bytes
≤ 16
34
≥ 1
1
1
1
1
b6
0
1
t DH
Initial Sequence
START, Device Select, RW = ‘1’
START, Device Select, RW = ‘0’, Address
reSTART, Device Select, RW = ‘1’
Similar to Current or Random Address Read
START, Device Select, RW = ‘0’
START, Device Select, RW = ‘0’
t R
Micron Technology, Inc., reserves the right to change products or specifications without notice.
b5
1
1
t SU:DAT
b4
0
0
©2003, 2004, 2005 Micron Technology, Inc. All rights reserved.
SA2
SA2
b3
Serial Presence-Detect
CHIP ENABLE
SA1
SA1
b2
t SU:STO
t BUF
SA0
SA0
b1
UNDEFINED
RW
RW
RW
b0