w942508bh Winbond Electronics Corp America, w942508bh Datasheet - Page 26

• Manufacturer Part Number: w942508bh
• Manufacturer: Winbond Electronics Corp America

(3) CAS Latency field (A6 to A4)
(4) DLL Reset bit (A8)
(5) Mode Register /Extended Mode register change bits (BS0, BS1)
(6) Extended Mode Register field
(7) Reserved field
1) DLL Switch field (A0)
2) Output Driver Size Control field (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 depends on the frequency of CLK.
This bit is used to reset DLL. When the A8 bit is "1", DLL is reset.
These bits are used to select MRS/EMRS.
This bit is used to select DLL enable or disable
This bit is used to select Output Driver Size, both Full strength and Half strength are based on
JEDEC standard.
Test mode entry bit (A7)
Reserved bits (A9, A10, A11, A12)
This bit is used to enter Test mode and must be set to "0" for normal operation.
These bits are reserved for future operations. They must be set to "0" for normal operation.
BS1 BS0
A6
A0
A1
0
0
0
0
1
1
1
1
0
0
1
0
1
0
1
A5
0
0
1
1
0
0
1
1
0
1
x
OUTPUT DRIVER
Disable
Enable
DLL
Half Strength
Full Strength
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A4
0
1
0
1
0
1
0
1
Extended MRS Cycle
Regular MRS Cycle
CAS LATENCY
Reserved
A12-A0
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
2.5
2
W942508BH