upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 872
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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
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Chapter 27
872
Figure 27-1
27.1.1 Description
27.1.2 Comparison results
27.1.3 Stand-by mode
Each Voltage Comparator consists of an operation amplifier and a logic block.
The operation amplifier is connected to the external voltage (V
input and to an internal reference voltage (V
reference voltage supply with the power regulators. The comparator output is
fed into a logic block that generates the interrupt signal INTVCn and sets or
clears the flag VCSTRn.VCFn. The comparison result of Voltage Comparator 0
is also output to the VCMPO0 pin.
The figure below shows a block diagram of the Voltage Comparator.
mparator block diagram
Voltage comparison leads to the following results:
• Output signal VCMPO0 and flag VCSTRn.VCFn
• Interrupt signal INTVCn
In order to reduce power consumption during STOP mode, the Voltage
Comparator can be set into stand-by mode. This is done by setting
VCCTLn.VCEn = 0.
If the Voltage Comparator is set in stand-by mode it assumes that
V
Preliminary User’s Manual U17566EE1V2UM00
CMPn
– V
– V
Depending on the settings of bits VCCTLn.ESn[1:0], the interrupt signal
INTVCn is generated upon one or both of the above transitions of V
The output signal VCMPO0 of the Voltage Comparator is low (for n = 0)
and the flag VCSTRn.VCFn is cleared.
The output signal VCMPO0 of the Voltage Comparator is high (for n = 0)
and the flag VCSTRn.VCFn is set.
CMPn
CMPn
> V
VCMPO0
VCMPn
LVI
< V
> V
(VCSTRn.VCFn = 1 and VCMPO0 = high level).
LVI
LVI
V
CMPn
:
:
V
LVI
+
-
LVI
) with the other. It shares the
VCSTRn.VCFn
Logic
Block
Voltage Comparator
CMPn
INTVCn
) with one
CMPn
.
Co
Voltage
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