• TI Thinks Resolved

CC3220S: memory validation

Intellectual 470 points
SONU GOYAL

Replies: 4

Views: 80

Part Number: CC3220S

Hi,

We are using SPI flash (MX25R3235F) with CC3220S MCU. Both MCU and SPI flash VCC voltage is 3V. The same SPI flash part no is used in launch pad of CC3220S. 

We are seeing issue in DC analysis calculation. VoH (min) of CC3220S is 2.1V and VIH (min) of flash  MX25R3235F is 0.8VCC = 0.8x3 = 2.4V

Here VoH<VIH

As per rule VOH>VIH to interface two chips. Here this rule is violating.

Please suggest us on this how this memory part MX25R3235F is validated with CC3220S. 

Intellectual 470 points
SONU GOYAL
  • Mastermind 20655 points
    PM

    Hi,

    We will look into it and get back to you ASAP. Please bear with us.

    Thanks,

    PM

  • Genius 16000 points
    Seong Kim

    Hi Sonu,

    How are you determining that the CC3220'S VOH (min) is 2.1V when powering it with 3V?

    BR,

    Seong

  • Intellectual 470 points
    SONU GOYAL

    In reply to Seong Kim:

    Hi Seong,

    In CC3220S datasheet, in section 5.9 Electrical characteristics (page no 35) is VOH= VDDx0.7

    i.e 3x0.7 = 2.1V

  • Genius 16000 points
    Seong Kim

    In reply to SONU GOYAL:

    Sonu,

    Perhaps there is actually some buffer to MX25R3235F's VIH specification. The MX25R3235F is the suggested part for all of our SimpleLink Wi-Fi devices and we've also used the same flash memory device on the following EVMs below.

    1. CC3220S, CC3220SF, and CC3220MODSF LaunchPads
    2. CC3235S, CC3235SF, and CC3235MOD LaunchPads.

    These same EVMs were also used for testing and validation during development. I am unaware of any customer reports or returns regarding any issues with the interface with the MX25R3235F.

    BR,

    Seong


All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms of use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of use of this site. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

TI worldwide | Contact us | myTI login | Corporate citizenship

TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs and
embedded processors, along with software, tools and the industry’s largest sales/support staff.

© Copyright 1995-2019 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy policy | Terms of Use