Z8F082ASH020SC datasheet(139/244 Pages) ZILOG

139 / 244 page

PS024705-0405

P R E L I M I N A R Y

Analog-to-Digital Converter

Z8 Encore! XP® F08xA Series

Product Specification

121

Reserved—Must be undefined.

OVF—Overflow Status

0= An overflow did not occur in the digital filter for the current sample.

1= An overflow did occur in the digital filter for the current sample.

ADC High Threshold Register

The ADC High Threshold register is used to set the trigger point above which an ADC

sample causes a CPU interrupt.

ADCTH—ADC High Threshold

These bits are compared to the most significant 8 bits of the single-ended ADC value. If

the ADC value exceeds this, an interrupt is asserted. The alarm function is not available in

DIFFERENTIAL mode.

ADC Low Threshold Register

The ADC Low Threshold register is used to set the trigger point below which an ADC

sample causes a CPU interrupt.

ADCTL—ADC Low Threshold

These bits are compared to the most significant 8 bits of the single-ended ADC value. If

the ADC value drops below this value an interrupt is asserted. The alarm function is not

available in DIFFERENTIAL mode.

Table 74. ADC High Threshold High Byte (ADCTH)

BITS

FIELD

ADCTH

RESET

R/W

R/WR/W

ADDR

F74H

Table 75. ADC Low Threshold High Byte (ADCTL)

BITS

FIELD

ADCTL

RESET

000

R/W

R/WR/W

ADDR

F76H

Z8F082ASH020SC Datasheet(PDF) 139 Page - Zilog, Inc.

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