Comparator C (Cmpc); Overview - Renesas RX100 Series User Manual

RX13T Group
28.

Comparator C (CMPC)

28.1

Overview

Comparator C compares a reference input voltage to an analog input voltage.
The comparison result can be read by software and output externally, and an interrupt request can be generated upon any
changes to the comparison result.
The reference input voltage of comparator C can be selected from the input from the CVREFC0 pin or the output from
on-chip D/A converter 0.
There are four analog inputs, one of which is to be selected.
Table 28.1 lists the specification of comparator C, Figure 28.1 shows a block diagram of comparator C, and Table
28.2 shows a comparator C pin configuration.
Table 28.1 lists the specification of comparator C, Figure 28.1 shows a block diagram of comparator C, Table 28.2
shows a comparator C pin configuration, and Table 28.3 shows the analog input pin connections for comparator C.
In this section, "PCLK" is used to refer to PCLKB.
Table 28.1 Comparator C Specifications
Item
Number of channels
Analog input voltages
Reference input voltage
Comparison result
Digital filter function
Interrupt request
Low power consumption function
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
Specification
Three (comparator C0 to comparator C2)
Input voltage from the CMPCnm pin (n = channel number; m = 0 to 3)
Input voltage from the CVREFC0 pin or on-chip D/A converter 0 output voltage
The comparison result can be output externally.
 One of three sampling periods can be selected.
 The filter function can also be disabled.
 A noise-filtered signal can be used to generate the interrupt request output, POE source output,
and the signal can be used to read the comparison result via registers.
 An interrupt request is generated upon detecting a valid edge of the comparison result.
 A valid edge can be selected from a rising or a falling edge or both edges.
Module stop state can be set.
28. Comparator C (CMPC)
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