EM78P372KSS20 datasheet(80/118 Pages) EMC

80 / 118 page

EM78P372K

8-bit Microcontroller



Product Specification (V1.4) 05.11.2016

(This specification is subject to change without prior notice)

The following figure shows the Comparator Output block diagram.

To C0

To CPIF

To CMPOUT

CMRD

From other

comparator

RESET

From OP I/O

Figure 7-29 Comparator Output Configuration

7.10.3

Using Comparator as an Operation Amplifier

The comparator can be used as an operation amplifier if a feedback resistor is

externally connected from the input to the output. In this case, the Schmitt trigger

function can be disabled for power saving purposes, by setting Bit 4, Bit 3 <COS1,

COS0> of the IOC80 register to <1,1>. See table under Section 6.2.4, IOC80

(Comparator and TCCA Control Registers) for Comparator/OP select bits function

description.

NOTE

Under Operation Amplifier:

■ The CMPIE (IOCE0.4), CMPWE (RE.2), and CMPIF (RE.4) bits are invalid.

■ The comparator interrupt is invalid.

■ The comparator wake-up is invalid.

7.10.4

Comparator Interrupt



CMPIE (IOCE0.4) must be enabled for the

“ENI” instruction to take effect



Interrupt is triggered whenever a change occurs on the comparator output pin



The actual change on the pin can be determined by reading the Bit CMPOUT,

IOC80<5>.



CMPIF (RE.4), the comparator interrupt flag, can only be cleared by software

EM78P372KSS20 Datasheet(PDF) 80 Page - ELAN Microelectronics Corp