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參數(shù)資料
| 型號(hào)： | HYS72D128300GBR |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Connector Wall Plate; Color:White; Leaded Process Compatible:Yes; No. of Ports:6 RoHS Compliant: Yes |
| 中文描述： | 184針注冊(cè)雙倍數(shù)據(jù)速率SDRAM模塊 |
| 文件頁數(shù)： | 44/45頁 |
| 文件大?。?/td> | 1208K |
| 代理商： | HYS72D128300GBR |
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HYS72D[128/256][300/320/321/500][GBR/HR]-[5/6/7/7F]-B
Registered Double Data Rate SDRAM Module
Application Note
44
Rev. 0.5, 2003-12
Data Sheet
Self Refresh Exit (RESET low, clocks running) — Optional
1. The system applies valid logic levels to the data inputs of the register (address and controls at the DIMM
connector). CKE must be maintained low and all other inputs should be driven to a known state. In general
these commands can be determined by the system designer. One option is to apply an SDRAM ‘NOP’
command (with CKE low), as this is the first command defined by the Self Refresh Exit sequence (ideally this
would be a ‘NOP Deselect’ command). A second option is to apply low levels on all of the register inputs to be
consistent with the state of the register outputs.
2. The system switches RESET to a logic 'high' level. The SDRAM is now functional and prepared to receive
commands. Since the RESET signal is asynchronous, it does not need to be tied to a particular clock edge
(during this period, register inputs must continue to remain stable).
3. The system must maintain stable register inputs until normal register operation is attained. The registers have
an activation time that allows the clock receivers, input receivers, and output drivers sufficient time to be turned
on and become stable. During this time the system must maintain the valid logic levels described in Step 1. It
is also a functional requirement that the registers maintain a low state at the CKE outputs in order to guarantee
that the DDR SDRAMs continue to receive a low level on CKE. This activation time, from asynchronous
switching of RESET from low to high, until the registers are stable and ready to accept an input signal, is t (ACT
) as specified in the register and DIMM documentation.
4. The system can begin JEDEC defined DDR SDRAM Self Refresh Exit Procedure.
Self Refresh Entry/Exit (RESET high, clocks running) — Optional
As this sequence does not involve the use of the RESET function, the JEDEC standard SDRAM specification
explains in detail the method for entering and exiting Self Refresh for this case.
Self Refresh Entry (RESET high, clocks powered off) — Not Permissible
In order to maintain a valid low level on the register output, it is required that either the clocks be running and the
system drive a low level on CKE, or the clocks are powered off and RESET is asserted low according to the
sequence defined in this application note
.
In the case where RESET remains high and the clocks are powered off,
the PLL drives a High-Z clock input into the register clock input. Without the low level on RESET an unknown DIMM
state will result.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HYS72D128300GBR-5-B | Category 6 Termination Kit; Contents Of Kit:GigaBIX? mount, color-coded GigaBIX? connectors, wire guards, designation strips and labels, Velcro tie and installation guide RoHS Compliant: Yes |
| HYS72D128300GBR-6-B | Category 6 Termination Kit; Contents Of Kit:GigaBIX? mount, color-coded GigaBIX? connectors, wire guards, designation strips and labels, Velcro tie and installation guide RoHS Compliant: Yes |
| HYS72D128300GBR-7-B | Connector Wall Plate; Color:Almond; Leaded Process Compatible:Yes; No. of Ports:1 RoHS Compliant: Yes |
| HYS72D256320GBR-6-B | Aluminum Polymer Radial Lead Capacitor; Capacitance: 560uF; Voltage: 4V; Case Size: 8x9 mm; Packaging: Bulk |
| HYS72D256320GBR-7-B | Aluminum Polymer Radial Lead Capacitor; Capacitance: 680uF; Voltage: 4V; Case Size: 8x12 mm; Packaging: Bulk |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HYS72D128300GBR-5-B | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:184-Pin Registered Double Data Rate SDRAM Module |
| HYS72D128300GBR-6-B | 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:184 - Pin Registered Double-Data-Rate SDRAM Module |
| HYS72D128300GBR-7-B | 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:184 - Pin Registered Double-Data-Rate SDRAM Module |
| HYS72D128300HBR-5-B | 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:184 - Pin Registered Double-Data-Rate SDRAM Module |
| HYS72D128300HBR-5-C | 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:184-Pin Registered Double-Data-Rate SDRAM Module |
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