zq calibration
The I/Os for DDR3 are designed to use the JEDEC standard SSTL15, which is based on 1.5-V logic, while DDR2 uses JEDEC standard SSTL18 that's based on 1.8-V logic. Finally, the DDR3 architecture fully utilizes on-die termination (ODT), ZQ calibration,, ... 外驅動校準（Off-Chip Driver calibration）”的校準序列僅用於校準片外輸出驅動器。而DDR2記憶體無法支援ODT校準模式。 為了保持更高的信號完整性，DDR3記憶體中引入ODT和片上輸出驅動器。DDR3記憶體中新增了ZQ專用腳，在ZQ接腳與地面之間接有一個240歐姆±1％容差的外部參考電阻，便於進行校準。
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 zq calibration 相關參考資料
DDR3 SDRAM - 维基百科，自由的百科全书
CWD是作為寫入延遲之用，Reset提供超省電功能的命令，可以讓DDR3 SDRAM記憶體顆粒電路停止運作、進入超省電待命模式，ZQ則是一個新增的終端電阻校準功能，新增這個線路腳位提供了ODCE（On Die Calibration Engine）用來校準ODT（On Die Termination）內部終端電阻，新增SRT（Self-Reflash Temperature）可程式化溫度 ... https://zh.wikipedia.org DDR3's Impact on Signal Integrity | Electronic Design
The I/Os for DDR3 are designed to use the JEDEC standard SSTL15, which is based on 1.5-V logic, while DDR2 uses JEDEC standard SSTL18 that's based on 1.8-V logic. Finally, the DDR3 architecture f... http://www.electronicdesign.co DDR3:對比研究(3)-電腦週邊-EDNTaiwan電子技術設計
... 外驅動校準（Off-Chip Driver calibration）”的校準序列僅用於校準片外輸出驅動器。而DDR2記憶體無法支援ODT校準模式。 為了保持更高的信號完整性，DDR3記憶體中引入ODT和片上輸出驅動器。DDR3記憶體中新增了ZQ專用腳，在ZQ接腳與地面之間接有一個240歐姆±1％容差的外部參考電阻，便於進行校準。 https://archive.edntaiwan.com DDR3比DDR2多了ZQ校準的功能，什麼是ZQ校準? - PQI Group - the ...
DDR3的ZQ是一個新增的終端電阻校準功能，新增這個線路腳位提供了校準引擎ODCE( On-Die Calibration Engine)用來校準ODT（On Die Termination）內部中斷電阻，並新增了SRT（Self-Reflash Temperature）可程式化溫度控制記憶體時脈功能，SRT的加入讓記憶體顆粒在溫度、時脈和電源管理上進行優化，可以說在記憶體內，就做 ..... http://www.pqigroup.com i.MX53 DDR Calibration - NXP Semiconductors
i.MX53 DDR interface supports the following nine calibration processes: • ZQ calibration—Change the values of on-chip pull-up and pull-down resistors connected to the. VCC/2 pins. Unlike all other typ... https://www.nxp.com The Secrets of PC Memory: Part 4 | bit-tech.net
Carrying on from DDR1 and DDR2 in Part 3, Ryan investigates what makes DDR3 so special, by looking in-depth at its unique features like the Fly-By topology, Read/Write levelling, Dynamic On-Die Termi... https://www.bit-tech.net TN-41-02: DDR3 ZQ Calibration - Micron Technology, Inc.
DDR3 ZQ Calibration. Introduction. For more robust system operation, the DDR3 SDRAM driver design has been enhanced with reduced capacitance, dynamic on-die termination (ODT), and a new calibration sc... https://www.micron.com ZQ Calibration - Xilinx
This section of the MIG Design Assistant focuses on the ZQ Calibration defined by the JEDEC Specification, as it applies to the MIG 7 Series FPGA DDR3 designs. Note: This Answer Record is a part of t... https://www.xilinx.com [SOLVED] zq calibration in DDR3 - EDAboard.com
Hi all, can somebody give me any details about ZQ calibration and why it is necessary in DDR3 specification? http://www.edaboard.com |