參數(shù)資料
型號: HYB25D128400CT-5
廠商: QIMONDA AG
元件分類: DRAM
英文描述: 32M X 4 DDR DRAM, 0.7 ns, PDSO66
封裝: PLASTIC, TSOP2-66
文件頁數(shù): 10/44頁
文件大小: 2618K
代理商: HYB25D128400CT-5
HYB25D128[40/80/16]0C[C/E/F/T]
128-Mbit Double-Data-Rate SDRAM
Internet Data Sheet
Rev. 1.70, 2008-04
18
03292006-U5AN-6TI1
3
Functional Description
The 128-Mbit Double-Data-Rate SDRAM uses a double-data-rate architecture to achieve high-speed operation.
3.1
Mode Register Definition
The Mode Register is used to define the specific mode of operation of the DDR SDRAM.
TABLE 10
Mode Register Definition
Field
Bits
Type1)
1) W = write only register bit
Description
BL
[2:0]
W
Burst Length
Note: All other bit combinations are RESERVED.
001B 2
010B 4
011B 8
BT
3
Burst Type
0 Sequential
1 Interleaved
CL
[6:4]
CAS Latency
Note: All other bit combinations are RESERVED.
010B 2
110B 2.5
011B 3
MODE [11:7]
Operating Mode
Note: All other bit combinations are RESERVED.
00000 Normal Operation without DLL Reset
00010 Normal Operation with DLL Reset
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