參數(shù)資料
型號(hào): 82439TX
廠商: INTEL CORP
元件分類: 存儲(chǔ)控制器/管理單元
英文描述: System Controller(系統(tǒng)控制器)
中文描述: 256M X 8, DRAM CONTROLLER, PBGA324
封裝: BGA-324
文件頁(yè)數(shù): 58/83頁(yè)
文件大?。?/td> 461K
代理商: 82439TX
82439TX (MTXC)
E
58
PRELIMINARY
desktop and Mobile PC’s. There are three grade parts defined for the 430TX. All of the speed grade conform to
the
SDRAM PC Specification
. For information on the performance of each of the Speed grade parts, refer to the
DRAM performance section. The Three speed grade parts are shown in Table 15.
Table 15. SDRAM Speed Grade Parts
Speed Grade
CAS latency (CL)
RAS to CAS (Trcd)
System Frequency
66.67 MHz
3
3
60/66 MHz
66.67 MHz
3
2
60/66 MHz
66.67 MHz
2
2
60/66 MHz
SDRAM Command Reference
The 430TX supports the following commands:
Command
Command
Mode Register Set (MRS)
No Operation (NOP)
Activate Bank (ACT)
Auto Refresh CBR (REFR)
Read Bank (RD)
Data Write/Output Enable
Write Bank (WR)
Data Mask/Output Disable
Precharge All Banks (PALL)
Self Refresh Entry
Deselect Device
Self Refresh Exit
Table 16 MRS command (Mode Register Set) Supported by the MTXC.
Table 16. Command Fields
A11
A10
A9
A8
A7
A[6:4]
A3
A[2:0]
0
0
0
0
0
CL
WT
BL
CAS Latency Field (CL)
Wrap Type Field (WT)
Burst Length Field (BL)
Bits[6:4]
CAS Latency
Bit 3
Type
Bits[2:0]
Burst Length
010
2
0
X
010
4
011
3
1
Interleave
All Other
X
All Other
X
The linear order addressing is
not supported.
NOTES:
1.
X=Don’t Care. These Modes are Don’t Care for MTXC specific implementation.
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參數(shù)描述
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