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參數(shù)資料
| 型號(hào)： | K4D263238D |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | Aluminum Electrolytic Radial Lead Hi Temp 150 Deg Capacitor; Capacitance: 470uF; Voltage: 35V; Case Size: 16x31.5 mm; Packaging: Bulk |
| 中文描述： | 100萬x 32Bit的× 4銀行雙數(shù)據(jù)速率同步DRAM的雙向數(shù)據(jù)選通和DLL |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 239K |
| 代理商： | K4D263238D |
128M DDR SDRAM
K4D263238D
- 7 -
Rev. 1.3 (Jul. 2002)
Power-Up Sequence
DDR SDRAMs must be powered up and initialized in a predefined manner to prevent undefined operations.
1. Apply power and keep CKE at low state (All other inputs may be undefined)
- Apply VDD before VDDQ .
- Apply VDDQ before VREF & VTT
2. Start clock and maintain stable condition for minimum 200us.
3. The minimum of 200us after stable power and clock(CK,CK ), apply NOP and take CKE to be high.
4. Issue precharge command for all banks of the device.
5. Issue a EMRS command to enable DLL
6. Issue a MRS command to reset DLL. The additional 200 clock cycles are required to lock the DLL.
*
1,2
7. Issue precharge command for all banks of the device.
8. Issue at least 2 or more auto-refresh commands.
9. Issue a mode register set command with A8 to low to initialize the mode register.
*1
*1 The additional 200cycles of clock input is required to lock the DLL after enabling DLL.
*2 Sequence of 6&7 is regardless of the order.
FUNCTIONAL DESCRIPTION
Power up & Initialization Sequence
Command
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
tRP
2 Clock min.
precharge
ALL Banks
2nd Auto
Refresh
Mode
Register Set
CoAny
t
RFC
～
1st Auto
Refresh
t
RFC
～
EMRS
MRS
2 Clock min.
DLL Reset
～
～
precharge
ALL Banks
t
RP
CK
CK
Inputs must be
stable for 200us
～
200 Clock min.
～
2 Clock min.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| K4D263238D-QC40 | 1M x 32Bit x 4 Banks Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL |
| K4D263238D-QC50 | 1M x 32Bit x 4 Banks Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL |
| K4D263238E | Aluminum Electrolytic Radial Lead Hi Temp 150 Deg Capacitor; Capacitance: 100uF; Voltage: 100V; Case Size: 12.5x25 mm; Packaging: Bulk |
| K4D263238E-GC25 | DIODE ZENER SINGLE 300mW 15.2Vz 10mA-Izt 0.02535 0.05uA-Ir 12 SOT-23 3K/REEL |
| K4D263238E-GC2A | DIODE ZENER TRIPLE ISOLATED 200mW 15.2Vz 10mA-Izt 0.02535 0.05uA-Ir 12 SOT-363 3K/REEL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| K4D263238D-QC40 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:1M x 32Bit x 4 Banks Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL |
| K4D263238D-QC50 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:1M x 32Bit x 4 Banks Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL |
| K4D263238E | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:1M x 32Bit x 4 Banks Graphic Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL |
| K4D263238E-GC25 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:1M x 32Bit x 4 Banks Graphic Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL |
| K4D263238E-GC2A | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:1M x 32Bit x 4 Banks Graphic Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL |
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