EM78P372KSS20 datasheet(79/118 Pages) EMC

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EM78P372K

8-bit Microcontroller

Product Specification (V1.4) 05.11.2016

 71

(This specification is subject to change without prior notice)

7.10

Comparator

The EM78P372K has one

comparator which has two

analog inputs and one output.

The comparator can be

employed to wake up the system

from sleep/idle mode. The Figure

at right shows the comparator

circuit.

Cin -

CMP

Cin+

Cin -

Output

10mV

Figure 7-28 Comparator Operating

Mode

7.10.1

External Reference Signal

The analog signal that is presented at Cin

– compares to the signal at Cin+, and the

digital output (CO) of the comparator is adjusted accordingly by taking the following

notes into considerations:

NOTE

■ The reference signal must be between Vss and Vdd.

■ The reference voltage can be applied to either pin of the comparator.

■ Threshold detector applications may be of the same reference.

■ The comparator can operate from the same or different reference sources.

7.10.2

Comparator Output

 The compared result is stored in the CMPOUT of IOC80.

 The comparator outputs are sent to CO (P64) by programming Bit 4 and Bit 3

<COS1, COS0> of the IOC80 register to <1,0>. See table under Section 6.2.4,

IOC80 (Comparator and TCCA Control Registers) for Comparator/OP select bits

function description.

EM78P372KSS20 Datasheet(PDF) 79 Page - ELAN Microelectronics Corp