DA14585 Power consumption problem

⚠️
Hi there.. thanks for coming to the forums. Exciting news! we’re now in the process of moving to our new forum platform that will offer better functionality and is contained within the main Dialog website. All posts and accounts have been migrated. We’re now accepting traffic on the new forum only - please POST any new threads at//www.xmece.com/support. We’ll be fixing bugs / optimising the searching and tagging over the coming days.
2 posts / 0 new
Last post
Sun, 2020-09-06 09:54
#1
yekun
Offline
Last seen:3 weeks 2 days ago
Joined:2020-04-28 12:09
DA14585 Power consumption problem

I have a few questions about external FLASH：

1、I want to use DA14585 to boot from external FLASH. What should I do to reduce the current?

2、I bought DA14585 development board here. How should I measure the current of W25x20CL and DA14585?

3、If I need a SUTA upgrade, should I only be able to use external SPI FLASH because OTP can only burn once?

Thanks .

Device:
DA14585
Mon, 2020-09-07 13:53
PM_Dialog
Offline
Last seen:12 hours 52 min ago
Staff
Joined:2018-02-08 11:03
Hi yekun,

Hi yekun,

  1. Please see Figure 12: BootROM Sequence in the DA14585 datasheet. When booting from an external Flash, the code will be copied to the System-RAM, the BootROM code will re-map it to address 0x00, a SW reset will take place an then the device boots. In order to reduce the power consumption, you could power-down your flash. For this scope, the appropriate power-down command should be sent to the flash and when is going to be used, you should release from power-down mode. Please check spi_flash_power_down() and spi_flash_release_from_power_down() APIs from the SDK.
  2. You can use the Power Profiler from theSmartSnippets Toolbox V5.0.14 for Windows OS. Read section 11from theUM-B-083 SmartSnippets Toolbox User Manual (HTML)user manual. In case you want to measure the sleep current, you can also follow theTutorial 4: Sleep modes current measurementtutorial.
  3. I would recommend first checking theBLE SUOTA Update on DA14585/DA14586 and DA14531 Devices. No need to burn the OTP – you should just place the secondary boot loaded, the 2 images and the product header in the flash.

Thanks, PM_Dialog