Power-Up/Down Considerations in NOR Flash AN-501 Application Note
●Flash memory devices are widely used components in microcontroller systems as regular companions to MCUs. Compared to MCUs, complex PMICs, and other SoCs, Flash memory is perceived to be a rather simple device. For example, a typical serial Flash device is commonly housed in an eight-pin package, contains two data pins (in and out), and communicates with the MCU over a simple four-wire SPI protocol. Such perceived simplicity, however, can be deceiving. Some important system design requirements specific to NOR Flash, such as proper power-up sequencing, can be overlooked. Under certain conditions, this can lead to unexpected and undesirable system operation.
●The purpose of this document is to create awareness of the importance of proper system design with respect to an important element of correct NOR Flash memory operation: the correct power-upand power-down sequencing.
●The importance of a correct power-up sequencing (often referred to as "VCC ramp") is described in more detail in Chapter2.
●Chapter 3 discusses hardware and software reset.
●Even when a Flash device is powered up correctly, it can still be susceptible to varying voltage levels that can occur during device operation, such as a brown-out condition. The consequences of brown-out, recovering from it,and avoiding it are described in Chapter4.
●Power-downis discussed in Chapter 5.
●Power cycling,as well as entering and exiting a variety of power saving modes represents its own challenges, which are discussed in Chapter 6.
● The Appendix describesa variety of methods of executing a reset.
|
[ Systems Engineers ][ Applications Engineers ][ FAEs ][ Engineering Managers ][ Marketing personnel ][ Sales personnel ] |
|
|
Application note & Design Guide |
|
|
|
|
Please see the document for details |
|
|
|
|
|
|
|
|
|
|
|
English Chinese Chinese and English Japanese |
|
|
05-2021 |
|
|
Revision A1 |
|
|
AN-501 |
|
|
1 MB |
- +1 Like
- Add to Favorites
Recommend
- Renesas Completes Acquisition of Dialog Semiconductor
- Renesas and Dialog Semiconductor Announce Conclusion of Final Regulatory Review and the Expected Closing Date for Acquisition
- Dialog Semiconductor’s DA16200 Secures PSA Certified Level 1 for Wi-Fi SoCs
- Dialog Semiconductor Delivers WiRa™-Enabled Solution to Enhance Carnival Corporation’s OceanMedallion™ Wearable
- Dialog Semiconductor’s Power Management Selected for the Xilinx Kria K26 Adaptive System-on-Modules
- Dialog Semiconductor Announces New Family of PMICs for Powering High Performance Automotive AI SoCs
- Renesas‘ Semiconductor Manufacturing Factory (Naka Factory) Fire: Production Capacity Has Recovered to 88%
- Renesas and Wolfspeed Sign 10 Year Silicon Carbide Wafer Supply Agreement to Empower Scale Renesas‘ Power Semiconductor Offerings
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
