PRELIMINARY
CYW54907
6.4 System Boot Sequence
The following general sequence occurs after a CYW54907 is powered on:
1. Either REG_ON or HIB_REG_ON_IN is asserted.
Note: For HIB_REG_ON_IN to function as intended, HIB_REG_ON_OUT must be connected to REG_ON.
2. The core LDO (CLDO) and LDO3P3 outputs stabilize.
3. The OTP memory bits are used to initialize various functions, such as PMU trimming, package selection, memory size selection,
etc.
4. The APP and WLAN cores are powered up.
5. The XTAL is powered up.
6. The APP and WLAN CPU bootup sequences start.
Document Number: 002-19312 Rev. *C
Page 25 of 95
CYPRESS [ CYPRESS ]
