MT18VDDT12872AG-40BF1 Micron Technology Inc, MT18VDDT12872AG-40BF1 Datasheet - Page 25

• Manufacturer Part Number: MT18VDDT12872AG-40BF1
• Description: MODULE DDR SDRAM 1GB 184-DIMM
• Manufacturer: Micron Technology Inc

Specifications of MT18VDDT12872AG-40BF1

• Memory Type: DDR SDRAM
• Memory Size: 1GB
• Speed: 400MT/s
• Package / Case: 184-DIMM
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 17: EEPROM Device Select Code
Most significant bit (b7) is sent first
Table 18: EEPROM Operating Modes
pdf: 09005aef80814e61, source: 09005aef80a43eed
DDA18C32_64_128x72AG.fm - Rev. E 9/04 EN
SELECT CODE
MODE
SDA OUT
Memory Area Select Code (two arrays)
Protection Register Select Code
Current Address Read
Random Address Read
Sequential Read
Byte Write
Page Write
SDA IN
SCL
t SU:STA
Figure 14: SPD EEPROM Timing Diagram
RW BIT
1
0
1
1
0
0
t F
t HD:STA
t LOW
t AA
V
V
V
V
IH
IH
IH
IH
256MB, 512MB, 1GB (x72, ECC, DR), PC3200
WC
V
V
or V
or V
or V
or V
IL
IL
IL
IL
IL
IL
b7
t HIGH
1
0
DEVICE TYPE IDENTIFIER
t HD:DAT
BYTES
25
1
1
1
1
16
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.
184-PIN DDR SDRAM UDIMM
b5
1
1
t SU:DAT
b4
0
0
SA2
SA2
b3
CHIP ENABLE
SA1
SA1
b2
t SU:STO
t BUF
©2004 Micron Technology, Inc.
SA0
SA0
b1
UNDEFINED
RW
RW
RW
b0