參數(shù)資料
型號(hào)： W9425G8DH-6
廠商： WINBOND ELECTRONICS CORP
元件分類： DRAM
英文描述： 32M X 8 DDR DRAM, 0.7 ns, PDSO66
封裝： 0.400 INCH, 0.65 MM PITCH, ROHS COMPLIANT, TSOP2-66
文件頁(yè)數(shù)： 6/53頁(yè)
文件大?。?/td> 1920K
代理商： W9425G8DH-6
W9425G8DH
Publication Release Date: Nov. 20, 2007
- 14 -
Revision A4
7.10 Mode Register Operation
The mode register is programmed by the Mode Register Set command (MRS/EMRS) when all banks
are in the idle state. The data to be set in the Mode Register is transferred using the A0 to A12 and
BS0, BS1 address inputs.
The Mode Register designates the operation mode for the read or write cycle. The register is divided
into five filed: (1) Burst Length field to set the length of burst data (2) Addressing Mode selected bit to
designate the column access sequence in a Burst cycle (3) CAS Latency field to set the assess time in
clock cycle (4) DLL reset field to reset the DLL (5) Regular/Extended Mode Register filed to select a
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.
7.10.1 Burst Length field (A2 to A0)
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.
A2
A1
A0
BURST LENGTH
0
Reserved
0
1
2 words
0
1
0
4 words
0
1
8 words
1
x
Reserved
7.10.2 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
相關(guān)PDF資料
PDF描述
W946432AD-6 2M X 32 DDR DRAM, 0.1 ns, PQFP100
W947D6HBHX6E 8M X 16 DDR DRAM, 5 ns, PBGA60
W9602BB PUSHBUTTON SWITCH, SPST, MOMENTARY, 10A, 28VDC, PANEL MOUNT-THREADED
W9605BB PUSHBUTTON SWITCH, SPST, MOMENTARY, 10A, 28VDC, PANEL MOUNT-THREADED
W9606BB PUSHBUTTON SWITCH, SPDT, MOMENTARY, 10A, 28VDC, PANEL MOUNT-THREADED
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W9425G8EH 制造商:WINBOND 制造商全稱:Winbond 功能描述:8M × 4 BANKS × 8 BITS DDR SDRAM
W946432AD 制造商:WINBOND 制造商全稱:Winbond 功能描述:512K X 4 BANKS X 32 BITS DDR SDRAM
W9464G6IB 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M × 4 BANKS × 16 BITS DDR SDRAM
W9464G6IH 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M ?? 4 BANKS ?? 16 BITS DDR SDRAM
W9464G6JH 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M ? 4 BANKS ? 16 BITS DDR SDRAM
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