Cypress FM4 Series - Low-Voltage Detection Voltage Control Register (LVD_CTL)

CHAPTER 5: Low-voltage Detection
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 183
5.1 Low-voltage Detection Voltage Control Register (LVD_CTL)
The Low-voltage Detection Voltage Control Register (LVD_CTL) controls whether to enable monitoring
the power supply voltage for a low-voltage detection interrupt and specifies the detection voltage for a
low-voltage detection interrupt.
bit
7
6
5
4
3
2
1
0
Field
LVDIE
SVHI
Reserved
Attribute
R/W
R/W
-
Initial value
0
00111
-
[bit7] LVDIE: Low-voltage detection interrupt enable bit
This bit is used to enable monitoring the power supply voltage of a low-voltage detection interrupt. When
not enabling monitoring the power supply voltage, the Low-voltage Detection Interrupt Circuit is stopped.
bit
Description
0
Does not enable the generation of a low-voltage detection interrupt. [Initial value]
1
Enables the generation of a low-voltage detection interrupt.
[bit6:2] SVHI: Low-voltage detection interrupt voltage setting bits
These bits are used to specify the detection voltage of a low-voltage detection interrupt.
 For TYPE1-M4, TYPE2-M4, TYPE6-M4 products
bit6:2
Description
00111
Set the low-voltage detection interrupt voltage in the vicinity of 2.8V.
[Initial value]
00100
Set the low-voltage detection interrupt voltage in the vicinity of 3.0V.
01100
Set the low-voltage detection interrupt voltage in the vicinity of 3.2V.
01111
Set the low-voltage detection interrupt voltage in the vicinity of 3.6V.
01110
Set the low-voltage detection interrupt voltage in the vicinity of 3.7V.
01001
Set the low-voltage detection interrupt voltage in the vicinity of 4.0V.
01000
Set the low-voltage detection interrupt voltage in the vicinity of 4.1V.
11000
Set the low-voltage detection interrupt voltage in the vicinity of 4.2V.
Others
Setting is prohibited.
 For TYPE3-M4, TYPE4-M4, TYPE5-M4 products
bit6:2
Description
00111
Set the low-voltage detection interrupt voltage in the vicinity of 2.9V.
[Initial value]
00100
Set the low-voltage detection interrupt voltage in the vicinity of 3.1V.
01100
Set the low-voltage detection interrupt voltage in the vicinity of 3.3V.
01111
Set the low-voltage detection interrupt voltage in the vicinity of 3.8V.
01110
Set the low-voltage detection interrupt voltage in the vicinity of 3.9V.
01001
Set the low-voltage detection interrupt voltage in the vicinity of 4.2V.
01000
Set the low-voltage detection interrupt voltage in the vicinity of 4.3V.
11000
Set the low-voltage detection interrupt voltage in the vicinity of 4.4V.
Others
Setting is prohibited.