Cypress FM4 Series - Procedure for Determining Factor for Returning from Deep Standby Mode

CHAPTER 6: Low Power Consumption Mode
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 227
7. Procedure for Determining Factor for Returning from Deep Standby
Mode
Figure 7-1 shows an example of procedure for determining the factor for returning from a deep standby
mode.
Figure 7-1 Procedure for Determining the Factor for Returning from a Deep Standby Mode
Note:
− After the CPU has transited to a deep standby mode, the power supply for the CPU is turned off
on a deep standby transition reset. Therefore, after the CPU has returned from a deep standby
mode, the value of the reset factor register (RST_STR) becomes invalid.
CPU returns from
from deep standby
mode.
Reset release
No
Is any bit in deep standby
return factor registers 1
and 2 (WRFSR, WIFSR)
1?
Yes
Determine factor with
reset factor register
(RST_STR).