w942508ch Winbond Electronics Corp America, w942508ch Datasheet - Page 26

• Manufacturer Part Number: w942508ch
• Description: 8m X 4 Banks X 8 Bit Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

type of MRS (Regular/Extended MRS). EMRS cycle can be implemented the extended function (DLL
enable/Disable mode)
The initial value of the Mode Register (including EMRS) after power up is undefined; therefore the
Mode Register Set command must be issued before power operation.
(1) Burst Length field (A2 to A0)
(2) Addressing Mode Select (A3)
This field specifies the data length for column access using the A2 to A0 pins and sets the Burst
Length to be 2, 4, and 8 words.
The Addressing Mode can be one of two modes; Interleave mode or Sequential Mode, When
the A3 bit is "0", Sequential mode is selected. When the A3 bit is "1", Interleave mode is
selected. Both addressing Mode support burst length 2, 4, and 8 words.
A2
A3
0
0
0
0
1
0
0
A1
0
0
1
1
x
ADDRESSING MODE
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A0
0
1
0
1
x
Sequential
Interleave
BURST LENGTH
Reserved
Reserved
2 words
4 words
8 words
W942508CH