mt18vddt12872ag-335 Micron Semiconductor Products, mt18vddt12872ag-335 Datasheet - Page 30

• Manufacturer Part Number: mt18vddt12872ag-335
• Description: 256mb, 512mb, 1gb, 2gb X72, Ecc, Dr 184-pin Ddr Sdram Udimm
• Manufacturer: Micron Semiconductor Products

Table 22: Serial Presence-Detect Matrix (256MB, 512MB, and 1GB) (Continued)
“1”/“0”: Serial Data, “driven to HIGH”/“driven to LOW”; notes appear on page 30
NOTE:
pdf: 09005aef80814e61, source: 09005aef807f8acb
DD18C32_64_128_256x72AG.fm - Rev. B 9/04 EN
4. The value of
99-127 Manufacturer-Specific Data (RSVD)
BYTE
95-98 Module Serial Number
1. Value for -26A
2. The value of
3. The JEDEC SPD specification allows fast or slow slew rate values for these bytes. The worst-case (slow slew rate) value is
94
SDRAM device specification is 15ns.
represented here. Systems requiring the fast slew rate setup and hold values are supported, provided the faster mini-
mum slew rate is met.
Week of Manufacture in BCD
t
t
RP,
RAS used for -26A/-265 modules is calculated from
t
DESCRIPTION
CK set to 7ns (0x70) for optimum BIOS compatibility. Actual device spec. value is 7.5ns.
t
RCD and
t
RAP for -335 modules indicated as 18ns to align with industry specifications; actual DDR
ENTRY (VERSION)
256MB, 512MB, 1GB, 2GB (x72, ECC, DR)
30
t
MT18VDDT3272A MT18VDDT6472A MT18VDDT12872A
RC -
Variable Data
Variable Data
Micron Technology, Inc., reserves the right to change products or specifications without notice.
184-PIN DDR SDRAM UDIMM
t
RP. Actual device spec. value is 40 ns.
–
Variable Data
Variable Data
–
©2004 Micron Technology, Inc. All rights reserved.
Variable Data
Variable Data
–