upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 871
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upd70f3422gj-gae-qs-ax
Manufacturer Part Number
upd70f3422gj-gae-qs-ax
Description
32-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3422GJ-GAE-QS-AX.pdf
(930 pages)
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Chapter 27 Voltage Comparator
Features summary
27.1 Overview
Note
Note
Preliminary User’s Manual U17566EE1V2UM00
The microcontroller has two instances of a Voltage Comparator.
Throughout this chapter, the individual instances of the Voltage Comparator
are identified by “n”, for example INTVCn for the generated interrupt signal.
The Voltage Comparator compares an external voltage V
and the internal reference voltage V
V
The comparison is mainly used to identify voltage drops of the external power
supply. The CPU has then the possibility to reduce its own power consumption.
By this it can avoid that its own power supply is dropping below the operating
conditions.
The Voltage Comparator has the following special features:
• Comparison of an external voltage with the internal reference voltage
• Can be completely switched off (in order to achieve zero stand-by current)
• Shares the reference voltage supply with the power regulators
• Delivers status information to the CPU:
• Can operate in STOP mode.
For details on the voltage levels refer to the Electrical Target Specification.
CMPn
– The compare result can be read by the CPU
– An interrupt can be generated on falling edge, rising edge, or both edges
– Each Voltage Comparator generates a separate interrupt INTVCn
of external supply voltage
< V
LVI
.
LVI
and generates an interrupt if
CMPn
at pin VCMPn
871
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