IS66/67WVR4M8ALL/BLL

Integrated Silicon Solution, Inc.- www.issi.com

9

Rev. A2

07/08/2024

3. Power-up Initialization

The SPI/QPI includes on-chip voltage sensor used to start the self-initialization process. When VDD reaches a

stable level at above the minimum VDD, the device will need 150us to complete its self-initialization process.

After the 150us period, the device will be ready for normal operation.

Figure 3.1 POWER-UP Timing

VDD

VDDmin

Device Initialization

Device is ready for normal operation

tPUmin =150us