MT18VDDT6472 Micron, MT18VDDT6472 Datasheet - Page 21

• Manufacturer Part Number: MT18VDDT6472
• Description: 200-Pin DDR SDRAM SODIMMs (x72)
• Manufacturer: Micron

EEPROM Device Select Code
Note: The most significant bit (b7) is sent first.
EEPROM Operating Modes
NOTE: 1. X = V
SPD EEPROM TIMING DIAGRAM
SERIAL PRESENCE-DETECT EEPROM TIMING PARAMETERS
32, 64 Meg x 72 DDR SDRAM DIMMs
DD18C32_64X72AG_B.p65–Rev. B, Pub. 1/02
Memory Area Select Code (two arrays)
Protection Register Select Code
MODE
Current Address Read
Random Address Read
Sequential Read
Byte Write
Page Write
SYMBOL
t
t
t
t
t
t
AA
BUF
DH
HD:DAT
HD:STA
F
SDA OUT
SDA IN
SCL
IH
or V
IL
.
t SU:STA
RW BIT
1
0
1
1
0
0
MIN
300
0.3
4.7
0
4
t F
t HD:STA
WC
V
V
MAX
X
X
X
X
300
t LOW
3.5
t AA
IL
IL
1
BYTES
UNITS
µs
µs
ns
ns
µs
µs
1
1
1
1
16
t HIGH
1
t HD:DAT
b7
DEVICE TYPE IDENTIFIER
1
0
21
START, Device Select, RW = ‘1’
START, Device Select, RW = ‘0’, Address
INITIAL SEQUENCE
reSTART, Device Select, RW = ‘1’
Similar to Current or Random Address Read
START, Device Select, RW = ‘0’
START, Device Select, RW = ‘0’
b6
SYMBOL
t
t
t
t
t
t
0
1
t DH
HIGH
LOW
SU:DAT
SU:STA
SU:STO
R
t R
Micron Technology, Inc., reserves the right to change products or specifications without notice.
184-pin DDR SDRAM DIMMs
b5
t SU:DAT
1
1
256MB, 512MB (ECC x72)
b4
0
0
b3
E2
E2
CHIP ENABLE
MIN
b2
E1
E1
250
4.7
4.7
4.7
t SU:STO
4
t BUF
©2002, Micron Technology, Inc.
UNDEFINED
MAX
b1
E0
E0
1
UNITS
RW
RW
RW
b0
µs
µs
µs
ns
µs
µs