W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 16
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W9425G6EH-5
Manufacturer Part Number
W9425G6EH-5
Description
IC DDR-400 SDRAM 256MB 66TSSOPII
Manufacturer
Winbond Electronics
Datasheet
1.W9425G6EH-5.pdf
(54 pages)
Specifications of W9425G6EH-5
Format - Memory
RAM
Memory Type
DDR SDRAM
Memory Size
256M (16Mx16)
Speed
250MHz
Interface
Parallel
Voltage - Supply
2.3 V ~ 2.7 V
Operating Temperature
0°C ~ 70°C
Package / Case
66-TSOPII
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W9425G6EH-5
Manufacturer:
WINBOND
Quantity:
1 728
Part Number:
W9425G6EH-5
Manufacturer:
WINBOND/华邦
Quantity:
20 000
7.10.3 CAS Latency field (A6 to A4)
7.10.4 DLL Reset bit (A8)
7.10.5 Mode Register /Extended Mode register change bits (BA0, BA1)
7.10.6 Extended Mode Register field
This bit is used to reset DLL. When the A8 bit is "1", DLL is reset.
These bits are used to select MRS/EMRS.
1) DLL Switch field (A0)
2) Output Driver Size Control field (A6, A1)
This field specifies the number of clock cycles from the assertion of the Read command to the first
data read. The minimum values of CAS Latency depend on the frequency of CLK.
The 100%, 60% and 30% or matched impedance driver strength are required Extended Mode
Register Set (EMRS) as the following:
This bit is used to select DLL enable or disable
BA1
A6
0
0
0
0
1
1
1
1
0
0
1
A0
A6
0
1
0
0
1
1
A5
0
0
1
1
0
0
1
1
BA0
0
1
x
A1
0
1
0
1
A4
0
1
0
1
0
1
0
1
- 16 -
Extended MRS Cycle
Regular MRS Cycle
Disable
Enable
DLL
Reserved
A12-A0
Publication Release Date:Dec. 03, 2008
BUFFER STRENGTH
CAS LATENCY
Reserved
Reserved
Reserved
Reserved
100% Strength
60% Strength
30% Strength
Reserved
2.5
2
3
4
W9425G6EH
Revision A08