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參數(shù)資料
| 型號(hào)： | MC-458CA725 |
| 廠商： | NEC Corp. |
| 英文描述： | 8M-Word By 72-BIT Dynamic RAM Module(8M×72位動(dòng)態(tài)RAM模塊) |
| 中文描述： | 800萬字由72位動(dòng)態(tài)內(nèi)存模塊（8米× 72位動(dòng)態(tài)內(nèi)存模塊） |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 135K |
| 代理商： | MC-458CA725 |
10
MC-458CA725
Serial PD
(1/2)
Byte No.
Function Described
Hex
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Notes
0
Defines the number of bytes written
into serial PD memory
80H
1
0
0
0
0
0
0
0
128 bytes
1
Total number of bytes of serial PD
memory
08H
0
0
0
0
1
0
0
0
256 bytes
2
Fundamental memory type
04H
0
0
0
0
0
1
0
0
SDRAM
3
Number of rows
0CH
0
0
0
0
1
1
0
0
12 rows
4
Number of columns
09H
0
0
0
0
1
0
0
1
9 columns
5
Number of banks
01H
0
0
0
0
0
0
0
1
1 bank
6
Data width
48H
0
1
0
0
1
0
0
0
72 bits
7
Data width (continued)
00H
0
0
0
0
0
0
0
0
0
8
Voltage interface
01H
0
0
0
0
0
0
0
1
LVTTL
9
CL = 3 cycle time
A0H
1
0
1
0
0
0
0
0
10 ns
10
CL = 3 access time
70H
0
1
1
1
0
0
0
0
7 ns
11
DIMM configuration type
02H
0
0
0
0
0
0
1
0
ECC
12
Refresh rate / type
80H
1
0
0
0
0
0
0
0
Normal
13
SDRAM width
08H
0
0
0
0
1
0
0
0
×
8
14
Error checking SDRAM width
08H
0
0
0
0
1
0
0
0
×
8
15
Minimum clock delay
01H
0
0
0
0
0
0
0
1
1 clock
16
Burst length supported
8FH
1
0
0
0
1
1
1
1
1, 2, 4, 8, F
17
Number of banks on each SDRAM
04H
0
0
0
0
0
1
0
0
4 banks
18
/CAS latency supported
06H
0
0
0
0
0
1
1
0
2, 3
19
/CS latency supported
01H
0
0
0
0
0
0
0
1
0
20
/WE latency supported
01H
0
0
0
0
0
0
0
1
0
21
SDRAM module attributes
00H
0
0
0
0
0
0
0
0
22
SDRAM device attributes : General
0EH
0
0
0
0
1
1
1
0
23
CL = 2 cycle time
F0H
1
1
1
1
0
0
0
0
15 ns
24
CL = 2 access time
80H
1
0
0
0
0
0
0
0
8 ns
25-26
00H
0
0
0
0
0
0
0
0
27
t
RP (MIN.)
1EH
0
0
0
1
1
1
1
0
30 ns
28
t
RRD (MIN.)
14H
0
0
0
1
0
1
0
0
20 ns
29
t
RCD (MIN.)
1EH
0
0
0
1
1
1
1
0
30 ns
30
t
RAS (MIN.)
3CH
0
0
1
1
1
1
0
0
60 ns
31
Module bank density
10H
0
0
0
1
0
0
0
0
64M bytes
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC-458CA726 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CA726EFB-A10 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CA726EFB-A80 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CA726PFB-A10 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CA726PFB-A80 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
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