EasyManua.ls Logo

Cypress FM4 Series - Page 272

Cypress FM4 Series
1102 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
CHAPTER 7-2: VBAT Domain(A)
272 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
Table 4-1 Operation of On-board Regulator
SYS_STBY
VREGCTL = L
VREGCTL = H
"L"
Standby mode
Standby mode
"H"
Standby mode
Normal operation mode
Figure 4-2 Example of External Connection with Input Voltage (VI) of On-board Regulator Higher than 5.5 V
If the input voltage of the on-board regulator is higher than 5.5 V, the standby pin of the on-board
regulator cannot be directly controlled by the P48/VREGCTL pin.
Execute buffering with an open collector buffer whose voltage resistance is higher than the input voltage
of the on-board regulator.
Open collector buffer
(Example: 74LS07)
VBuf
VBuf: power supply of open collector buffer (5.5 V or below)
VBAT
VBAT Domain
On-chip regulator
VCC
RTC
P48/VREGCTL
P49/VWAKEUP
On-board regulator
VO
VI
STBY
SYS_STBY

Table of Contents

Related product manuals