CY8C25122 Cypress Semiconductor, CY8C25122 Datasheet - Page 116
CY8C25122
Manufacturer Part Number
CY8C25122
Description
8-Bit Programmable System-on-Chip (PSoC) Microcontrollers
Manufacturer
Cypress Semiconductor
Datasheet
1.CY8C25122.pdf
(148 pages)
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11.5
The Supply Voltage Monitor detector generates an inter-
rupt whenever Vcc drops below a pre-programmed
value. There are eight voltage trip points that are select-
able by setting the VM [2:0] bit in the Voltage Monitor
Table 95:
1.
Voltage Monitor Control Register (VLT_CR, Address = Bank 1, E3h)
116
Bit 7 : SMP Disables SMP function
0 = Switch Mode Pump enabled, default
1 = Switch Mode Pump disabled
Bit 6 : Reserved
Bit 5 : Reserved
Bit 4 : Reserved
Bit 3 : Reserved
Bit [2:0] : VM [2:0]
0 0 0 = 2.95 Trip Voltage
0 0 1 = 3.02 Trip Voltage 0 0 1 = 3.25 Trip Voltage
0 1 0 = 3.17 Trip Voltage 0 1 0 = 3.42 Trip Voltage
0 1 1 = 3.71 Trip Voltage 0 1 1 = 3.94 Trip Voltage
1 0 0 = 4.00 Trip Voltage 1 0 0 = 4.19 Trip Voltage
1 0 1 = 4.48 Trip Voltage 1 0 1 = 4.64 Trip Voltage
1 1 0 = 4.56 Trip Voltage 1 1 0 = 4.82 Trip Voltage
1 1 1 = 4.64 Trip Voltage 1 1 1 = 5.00 Trip Voltage
Bit Name
Low Voltage Detection
Read/
Write
Bit #
POR
Voltages are ideal typical values. Tolerances are in
Supply Voltage Monitor
Voltage Monitor Control Register
SMP
W
7
0
1
0 0 0 = 3.17 Trip Voltage
Reserved
Switch Mode Pump
RW
6
0
Cypress MicroSystems CY8C25122/CY8C26233/CY8C26443/CY8C26643 Family Data Sheet
Document #: 38-12010 CY Rev. ** CMS Rev. 3.20
Reserved
--
5
0
Reserved
Table 103 on page 127.
--
4
0
Control Register (VLT_CR). These bits also select the
Switch Mode Pump trip points. The Supply Voltage Mon-
itor will remain active when the device enters sleep
mode.
Reserved
--
3
0
VM [2]
W
2
0
VM [1]
W
1
0
September 5, 2002
VM [0]
W
0
0
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