W9425G6JH_13 Datasheet, PDF (15/52 Pages) Winbond – 4 M x 4 BANKS x 16 BITS DDR SDRAM

W9425G6JH
8.10.2 Addressing Mode Select (A3)
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.
A3
ADDRESSING MODE
0
Sequential
1
Interleave
8.10.2.1. Addressing Sequence of Sequential Mode
A column access is performed by incrementing the column address input to the device. The
address is varied by the Burst Length as the following.
Addressing Sequence of Sequential Mode
DATA
Data 0
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
ACCESS ADDRESS
n
n+1
n+2
n+3
n+4
n+5
n+6
n+7
BURST LENGTH
2 words (address bits is A0)
not carried from A0 to A1
4 words (address bit A0, A1)
Not carried from A1 to A2
8 words (address bits A2, A1 and A0)
Not carried from A2 to A3
8.10.2.2. Addressing Sequence for Interleave Mode
A Column access is started from the inputted column address and is performed by interleaving the
address bits in the sequence shown as the following.
DATA
Data 0
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Addressing Sequence of Interleave Mode
ACCESS ADDRESS
A8 A7 A6 A5 A4 A3 A2 A1 A0
A8 A7 A6 A5 A4 A3 A2 A1 A0
A8 A7 A6 A5 A4 A3 A2 A1 A0
A8 A7 A6 A5 A4 A3 A2 A1 A0
A8 A7 A6 A5 A4 A3 A2 A1 A0
A8 A7 A6 A5 A4 A3 A2 A1 A0
A8 A7 A6 A5 A4 A3 A2 A1 A0
A8 A7 A6 A5 A4 A3 A2 A1 A0
BURST LENGTH
2 words
4 words
8 words
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Publication Release Date: Aug. 27, 2013
Revision A03