powerDown

Signatures

• bool SPIFlash::powerDown(void)
• bool SPIFram::powerDown(void)

What It Is For

Put memory chip into low-power mode for energy-sensitive systems.

Parameters

• No parameters.

Behavior Details

Use in battery-driven designs between memory operations. Always pair with powerUp() before next read/write.

Return Semantics

Returns true if command accepted by chip.

Failure Behavior

Unsupported on some chips or states; subsequent read/write calls fail while powered down.

Common Mistakes

• Powering down and then attempting reads/writes without wake-up.
• Assuming every chip fully supports low-power command set.
• Not integrating memory wake timing with MCU sleep/wake flow.

Choosing Between Similar APIs

• Use powerDown() for low-power idle intervals.
• Skip power cycling if your workload is high-frequency and latency-sensitive.
• Always schedule powerUp() before next access.

Example

flash.powerDown();
// sleep MCU
flash.powerUp();