參數(shù)資料
型號: KM432D5131
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 128K x 32Bit x 4 Banks Double Data Rate Synchronous Graphic RAM with Bi-directional Data Strobe(128K x 32位 x 4 組雙速率同步圖形RAM帶雙向數(shù)據(jù)選通)
中文描述: 128K的x 32Bit的× 4銀行雙數(shù)據(jù)速率同步圖形RAM的雙向數(shù)據(jù)選通(128K的× 32位× 4組雙速率同步圖形RAM的帶雙向數(shù)據(jù)選通)
文件頁數(shù): 6/47頁
文件大?。?/td> 912K
代理商: KM432D5131
Target
16M DDR SGRAM
- 7 -
KM432D5131
Rev. 0.6 (Apr. 1998)
Power-Up Sequence
The following sequence is recommended for POWER UP.
1. Apply power and start clock. Attempt to maintain CKE="H", DM="H" and the other pins are in NOP condition at the
input.
2. Maintain stable power, stable clock and NOP input condition for a minimum of 200
3. Issue precharge commands for all banks of the device.
4. Issue 2 or more auto-refresh commands.
5. Issue a mode register set command to initialize the mode register.
cf) Sequence of 4 & 5 is regardless of the order.
us
.
á
FUNCTIONAL DESCRIPTION
Power up Sequence & Auto Refresh(CBR)
Command
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
ó
t
RP
Minimum of 2 Refresh Cycles are required
1 tck
precharge
ALL Bank
2nd Auto
Refresh
Mode
Register Set
Any
Command
t
RC
ó
ó
1st Auto
Refresh
t
RC
ó
ó
ó
ó
ó
CK, CK
Inputs must be
stable for 200us
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