ZUSBOPTSC01ZAC datasheet(218/402 Pages) ZILOG

218 / 402 page

Comparator and Operational Amplifier

P R E L I M I N A R Y

PS024604-1005

Z8 Encore!® Motor Control Flash MCUs

Product Specification

196

Operational Amplifier Operation

To operate, the operational amplifier must be enabled by setting the OPEN bit in the Com-

parator and Op Amp Register to 1. In addition, the OPINP, OPINN, and OPOUT alternate

functions must be enabled on their respective general-purpose I/O pins. Refer to the GPIO

Alternate Functions section on page 36 for more information.

The logical value of the operational amplifier output (OPOUT) can be read from the Port 3

data input register if both the operational amplifier and input pin Schmitt trigger are

enabled. Refer to the GPIO Alternate Functions section on page 36 for more information.

The operational amplifier can also generate an interrupt via the GPIO Port B3 input inter-

rupt, if enabled.

The output of the operational amplifier is also connected to an analog input (ANA3) of the

Analog-to-Digital Converter (ADC) multiplexer.

The operational amplifier does not automatically power-down. To reduce operating cur-

rent when not in use, the operational amplifier may be disabled by clearing the OPEN bit in

the Comparator and Op Amp Register to 0.

When the operational amplifier is disabled, the output is high impedance.

Interrupts

The comparator will generate an interrupt on any change in the logic output value (from 0

to 1 and from 1 to 0). Refer to the Interrupt Controller chapter on page 51 for information

about enabling and prioritization of the comparator interrupt.

ZUSBOPTSC01ZAC 数据表(PDF) 218 Page - Zilog, Inc.