Initialization Sequence For DDR SDRAM - TU …

- Rev. A 1/04 EN1 2003 Micron Technology, Inc. All rights reserved. TN-46-08 Initialization Sequence for DDR SDRAMTECHNICAL NOTEINITIALIZATION Sequence FOR DDR SDRAMI ntroductionSDRAM is a volatile and complex memory is, when the power is removed, all contents andoperating configurations are lost. Each time the mem-ory is powered up, the device requires a defined proce-dure to initialize the internal state machines and toconfigure the various user defined operating technical note concentrates on the flow for theinitialization Sequence and the configurable DDR SDRAMTo ensure device functionality a predefinedsequence must occur at device power-up or in con-junction with a power-on reset. Step 1 Provide power. The device core power (VDD) anddevice I/O power (VDDQ) must be brought up simulta-neously to prevent device latch-up.

TN-46-08 Initialization Sequence for DDR SDRAM 09005aef80eaf953 Micron Technology, Inc., reserves the right to change products or specifications without notice.

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