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參數(shù)資料
| 型號(hào)： | MC-454AC726 |
| 廠商： | NEC Corp. |
| 英文描述： | 4M-Word By 72-BIT Dynamic RAM Module(4M×72位動(dòng)態(tài)RAM模塊) |
| 中文描述： | 分詞由72位動(dòng)態(tài)內(nèi)存模塊（4米× 72位動(dòng)態(tài)內(nèi)存模塊） |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 150K |
| 代理商： | MC-454AC726 |
10
MC-454AC726
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
0BH
0
0
0
0
1
0
1
1
11 rows
4
Number of columns
09H
0
0
0
0
1
0
0
1
9 columns
5
Number of banks
02H
0
0
0
0
0
0
1
0
2 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
(-A80)
80H
1
0
0
0
0
0
0
0
8 ns
(-A10)
A0H
1
0
1
0
0
0
0
0
10 ns
10
CL = 3 Access time
(-A80)
60H
0
1
1
0
0
0
0
0
6 ns
(-A10)
60H
0
1
1
0
0
0
0
0
6 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
02H
0
0
0
0
0
0
1
0
2 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
(-A80)
A0H
1
0
1
0
0
0
0
0
10 ns
(-A10)
D0H
1
1
0
1
0
0
0
0
13 ns
24
CL = 2 Access time
(-A80)
60H
0
1
1
0
0
0
0
0
6 ns
(-A10)
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.)
(-A80)
14H
0
0
0
1
0
1
0
0
20 ns
(-A10)
14H
0
0
0
1
0
1
0
0
20 ns
28
t
RRD MIN.)
(-A80)
10H
0
0
0
1
0
0
0
0
16 ns
(-A10)
14H
0
0
0
1
0
1
0
0
20 ns
29
t
RCD (MIN.)
(-A80)
14H
0
0
0
1
0
1
0
0
20 ns
(-A10)
14H
0
0
0
1
0
1
0
0
20 ns
30
t
RAS (MIN.)
(-A80)
30H
0
0
1
1
0
0
0
0
48 ns
(-A10)
32H
0
0
1
1
0
0
1
0
50 ns
31
Module bank density
04H
0
0
0
0
0
1
0
0
16M bytes
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC-454AD644-A67 | 4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AC724 | 4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AC724F-A67 | 4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AD644 | 4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AD646 | 4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC-454AD644 | 制造商:NEC 制造商全稱:NEC 功能描述:4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AD644-A10 | 制造商:NEC 制造商全稱:NEC 功能描述:4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AD644-A12 | 制造商:NEC 制造商全稱:NEC 功能描述:4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AD644-A67 | 制造商:NEC 制造商全稱:NEC 功能描述:4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
| MC-454AD646 | 制造商:NEC 制造商全稱:NEC 功能描述:4M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE |
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