參數(shù)資料
型號: KM416S4020B
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 2M x 16Bit x 2 Banks Synchronous DRAM(2M x 16位 x2組同步動態(tài)RAM)
中文描述: 200萬× 16 × 2銀行同步DRAM(2米× 16位x2組同步動態(tài)RAM)的
文件頁數(shù): 31/43頁
文件大小: 597K
代理商: KM416S4020B
ELECTRONICS
REV. 2 Mar. '98
TIMING DIAGRAM - II
CMOS SDRAM
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Page Read & Write Cycle at Same Bank @Burst Length=4
HIGH
Row Active
(A-Bank)
Read
(A-Bank)
Write
(A-Bank)
Precharge
(A-Bank)
: Don't care
*Note :
1. To write data before burst read ends, DQM should be asserted three cycle prior to write
command to avoid bus contention.
2. Row precharge will interrupt writing. Last data input, t
3. DQM should mask invalid input data on precharge command cycle when asserting precharge
before end of burst. Input data after Row precharge cycle will be masked internally.
RDL
before Row precharge, will be written.
Read
(A-Bank)
tRCD
*Note 2
tRDL
*Note 1
*Note 3
tCDL
Qa0
Qa1
Qb0
Qb1
Qb2
Qa0
Qa1
Qb0
Qb1
Dc0
Dc1
Dd0
Dd1
Dc0
Dc1
Dd0
Dd1
Write
(A-Bank)
BA
A
10
/AP
CL=2
CL=3
DQ
ADDR
CAS
RAS
CS
CKE
CLOCK
WE
DQM
Ra
Ca0
Cb0
Cc0
Cd0
Ra
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