參數(shù)資料
型號(hào): μPD45256841
廠商: NEC Corp.
英文描述: 256M-Bit Synchronous DRAM(256M 同步 動(dòng)態(tài)RAM)
中文描述: 256M位同步DRAM(256M同步動(dòng)態(tài)RAM)的
文件頁(yè)數(shù): 43/84頁(yè)
文件大小: 1052K
代理商: ΜPD45256841
4
μ
P
P
13.4
Mode Register Write (Burst length = 4, /CAS latency = 2)
CLK
CKE
/RAS
/CAS
/WE
BA1
/CS
T
0
T
1
T
2
T
3
T
4
T
5
T
6
T
7
T
8
T
9
T
10
T
11
T
12
T
13
T
14
T
15
T
16
T
17
T
18
T
19
T
20
T
21
A10
ADD
DQM
DQ
BA0
All Banks
Precharge
Command
AAAA
AAAA
AAAAAAA
AAAA
AAAA
AAAAAAA
AAAA
AAAAAAA
AAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAAAA
AAA
AAA
AAA
AAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
Register
Write
Command
Activate
Command
is valid
H
Hi-z
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
tRSC
tRP
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