Cypress FM4 Series - Setup Procedure Examples

CHAPTER 5: Low-voltage Detection
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 181
4. Setup Procedure Examples
This section explains the procedures to set up the Low-voltage Detection Circuit, giving examples.
Figure 4-1 Example of Low-voltage Detection Interrupt Setting
Write 0x1ACCE553 to the LVD_RLR
Register.
Start
Release write protection mode of the LVD_CTL Register.
Clearing a low-voltage detection
interrupt factor.
Set the detection interrupt voltage to the
LVD_CTL Register, and also set the
operation state to enable.
Set the LVD_CTL Register to write protection mode.
End
Write 0x00000000 to the LVD_RLR
Register.
(Write a value other than 0x1ACCE553.)
No
LVDIRDY=1 ?
Yes