Экономичная внешняя память., Объем и скорость небольшие. 1 мегабайт в сутки. Опции

[Tanya]

Что выбрать для наименьшего потребления?

[DASM]

"STM32L476xx devices feature up to 128 Kbyte of embedded SRAM. This SRAM is split into
..... 32 Kbyte located at address 0x1000 0000 with hardware parity check (SRAM2).
This block is accessed through the ICode/DCode buses for maximum performance.
These 32 Kbyte SRAM can also be retained in Standby mode.
200 нА

[esaulenka]

"STM32L476xx devices feature up to 128 Kbyte of embedded SRAM. This SRAM is split into
..... 32 Kbyte located at address 0x1000 0000 with hardware parity check (SRAM2).
This block is accessed through the ICode/DCode buses for maximum performance.
These 32 Kbyte SRAM can also be retained in Standby mode.
200 нА

Учу читать даташиты. Недорого. Сегодня пробное занятие, бесплатно.

Даташит STM32L476xx
- страница 1:
120 nA Standby mode (5 wakeup pins)
- страница 27:
Mode: Standby, Consumption: 0.35 µA w/o RTC, 0.65 µA w/ RTC
сноска 3. Typical current at VDD = 1.8 V, 25°C. Consumptions values provided running from SRAM, Flash memory Off, 80 MHz in Range 1, 26 MHz in Range 2, 2 MHz in LPRun/LPSleep.
- страница 143
Supply current in Standby mode (backup registers retained), RTC disabled
Vdd = 3V, temp=+85C: 2.6uA typ, 5.2uA max.
Если подогреть ещё на 40 градусов и подать 3.6 вольта, получаем 43uA max.


MB85RS1MT
Sleep current IZZ 10uA max
(within recommended operating conditions)
т.е. и при +85 градусах и 3.6 вольтах напряжения в том числе.