SC9RS08KA2 datasheet(83/134 Pages) FREESCALE

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SC9RS08KA2 Series Data Sheet, Rev. 1

Freescale Semiconductor

Chapter 10

Analog Comparator (RS08ACMPV1)

10.1

Introduction

The analog comparator module (ACMP) provides a circuit for comparing two analog input voltages or for

comparing one analog input voltage to an internal reference voltage. The comparator circuit is designed to

operate across the full range of the supply voltage (rail to rail operation).

Figure 10-1 shows the SC9RS08KA2 Series block diagram with the ACMP highlighted.

Figure 10-1. SC9RS08KA2 Series Block Diagram Highlighting ACMP Block and Pins

RS08 CORE

USER RAM — 63 BYTES

NOTES:

(1) Pins are software configurable with pullup/pulldown device if input port.

(2) Integrated pullup device enabled if reset enabled (RSTPE=1).

(3) These pins are not available in 6-pin package

POWER AND

VSS

VDD

INTERNAL CLOCK

SOURCE

BDC

RS08 SYSTEM CONTROL

RTI

CPU

COP

WAKEUP

LVD

RESET AND STOP WAKEUP

MODES OF OPERATION

POWER MANAGEMENT

5-BIT KEYBOARD

INTERRUPT MODULE

PTA0/KBIP0/ACMP+ (1)

PTA1/KBIP1/ACMP- (1)

PTA2/KBIP2/TCLK/RESET/VPP (1),( 2)

PTA3/ACMPO/BKGD/MS

ANALOG COMPARATOR

MODULE

MODULO TIMER

MODULE

PTA4/KBIP4 (1),(3)

PTA5/KBIP5 (1), (3)

INTERNAL REGULATOR

(KBI)

TCLK

ACMP-

ACMP+

ACMPO

(ICS)

(ACMP)

(MTIM)

USER FLASH

SC9RS08KA2 — 2048 BYTES

SC9RS08KA1 — 1024 BYTES

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