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參數(shù)資料
| 型號： | MC-458CB646EFB-A10 |
| 廠商： | NEC Corp. |
| 英文描述： | 8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| 中文描述： | 800萬字，64位同步動態(tài)RAM模塊無緩沖型 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 190K |
| 代理商： | MC-458CB646EFB-A10 |
Data Sheet M14279EJ3V0DS00
10
MC-458CB647
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
80H
1
0
0
0
0
0
0
0
128 bytes
serial PD memory
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
40H
0
1
0
0
0
0
0
0
64 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
75H
0
1
1
1
0
1
0
1
7.5 ns
10
CL = 3 Access time
54H
0
1
0
1
0
1
0
0
5.4 ns
11
DIMM configuration type
00H
0
0
0
0
0
0
0
0
Non-parity
12
Refresh rate/type
80H
1
0
0
0
0
0
0
0
Normal
13
SDRAM width
10H
0
0
0
1
0
0
0
0
×
16
14
Error checking SDRAM width
00H
0
0
0
0
0
0
0
0
None
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
A0H
1
0
1
0
0
0
0
0
10 ns
24
CL = 2 Access time
60H
0
1
1
0
0
0
0
0
6 ns
25-26
00H
0
0
0
0
0
0
0
0
27
t
RP(MIN.)
14H
0
0
0
1
0
1
0
0
20 ns
28
t
RRD(MIN.)
0FH
0
0
0
0
1
1
1
1
15 ns
29
t
RCD(MIN.)
14H
0
0
0
1
0
1
0
0
20 ns
30
t
RAS(MIN.)
2DH
0
0
1
0
1
1
0
1
45 ns
31
Module bank density
10H
0
0
0
1
0
0
0
0
64M
bytes
#
#
#
#
#
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| MC-458CA726PFB-A10 | 8M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC-458CB646EFB-A80 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CB646PFB-A10 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CB646PFB-A80 | 制造商:NEC 制造商全稱:NEC 功能描述:8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CB646XFB-A10 | 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-458CB646XFB-A80 | 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
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