參數資料
型號: HM5425161B
廠商: Hitachi,Ltd.
英文描述: 256M SSTL_2 interface DDR SDRAM(256M SSTL_2接口 DDR 同步DRAM)
中文描述: 256M DDR SDRAM的接口SSTL_2(256M SSTL_2接口的DDR同步DRAM)的
文件頁數: 21/62頁
文件大?。?/td> 1016K
代理商: HM5425161B
HM5425161B, HM5425801B, HM5425401B Series
21
Mode Register and Extended Mode Register Set
There are two mode registers, the mode register and the extended mode register so as to define the operating
mode. Parameters are set to both through the A0 to the A14 pins by the mode register set command [MRS] or
the extended mode register set command [EMRS]. The mode register and the extended mode register are set
by inputting signal via the A0 to the A14 during mode register set cycles. A14 (BA0) and A13 (BA1)
determine which one of the mode register or the extended mode register are set. Prior to a read or a write
operation, the mode register must be set.
Remind that no other parameters are shown in the table bellow are allowed to input to the registers.
Mode Register Set [MRS] (
A14 = 0, A13 = 0)
A2 A1 A0Burst Length
BT=0 BT=1
0
0
0
0
1
1
1
0
1
2
4
8
2
4
8
A3
0
1
Sequential
Interleave
Burst Type
A6 A5 A4 CAS Latency
0
1
0
1
1
0
2
2.5
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
0
0
0
0
DR
LMODE
BT
BL
A8
0
1
No
Yes
DLL Reset
A11
A10
A12
A13
(BA1)
0
A14
(BA0)
0
MRS
Extended Mode Register Set [EMRS]
(A14 = 1, A13 = 0)
A0
0
1
DLL Enable
DLL Disable
DLL Control
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
0
0
0
0
0
0
0
0
0
0
DLL
0
A11 A10
A12
A13
(BA1)
0
A14
(BA0)
1
EMRS
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相關代理商/技術參數
參數描述
HM5425161B/801B/401B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Series 256M SSTL-2 Interface DDR SDRAM 143 MHz/133 MHz/125
HM5425161BTT-10 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425161BTT-75A 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425161BTT-75B 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425401B 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank