MT8VDDT6432UY-5K1 Micron Technology Inc, MT8VDDT6432UY-5K1 Datasheet - Page 15

• Manufacturer Part Number: MT8VDDT6432UY-5K1
• Description: MODULE DDR 256MB 100-DIMM
• Manufacturer: Micron Technology Inc

Specifications of MT8VDDT6432UY-5K1

• Memory Type: DDR SDRAM
• Memory Size: 256MB
• Speed: 400MT/s
• Package / Case: 100-DIMM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DLL Enable/Disable
Figure 6:
pdf: 09005aef80745603, source: 09005aef807455eb
DD8C32_64_128x32UG_2.fm - Rev. G 5/05 EN
Extended Mode Register Definition Diagram
Notes: 1. BA1 and BA0 (E13 and E12 for 128MB, or E14 and E13 for 256MB, 512MB) must be “0, 1”
The extended mode register must be loaded when all device banks are idle and no bursts
are in progress, and the controller must wait the specified time before initiating any sub-
sequent operation. Violating either of these requirements could result in unspecified
operation.
The DLL must be enabled for normal operation. DLL enable is required during power-
up initialization and upon returning to normal operation after having disabled the DLL
for the purpose of debug or evaluation. (When the device exits self refresh mode, the
DLL is enabled automatically.) Any time the DLL is enabled, 200 clock cycles with CKE
HIGH must occur before a READ command can be issued.
128MB Module Address Bus
256MB and 512MB Modules Address Bus
2. QFC# is not supported.
E11
0
14
0
–
BA1 BA0
1
to select the Extended Mode Register (vs. the base Mode Register).
E10
0
1
13
BA1 BA0
13
0
1
–
1
1
12
E9
1
12
0
–
A12
11
E8
11
A11
0
–
A11
E7
10
0
–
10
A10
A10
Operating Mode
E6 E5
0
–
9
9
A9
A9
128MB, 256MB, 512MB: (x32, DR) 100-Pin DDR UDIMM
0
–
Operating Mode
8
A8
8
A8
E4
0
–
7
7
A7 A6 A5 A4 A3
A7 A6 A5 A4 A3
E3
0
–
6
6
E2
0
–
5
5
2
4
15
4
E1,
Valid
–
3
3
E0
2
2
A2 A1 A0
A2 A1 A0
DS
DS
Operating Mode
Normal Operation
All other states reserved
1
1
E1
0
Micron Technology, Inc., reserves the right to change products or specifications without notice.
DLL
DLL
0
0
E0
0
1
Extended Mode
Register (Ex)
Extended Mode
Register (Ex)
Drive Strength
Address Bus
Address Bus
Disable
Normal
Enable
DLL
Extended Mode Register
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