Datasheet

MC9RS08KA2 Series Data Sheet, Rev. 4
Freescale Semiconductor 83
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 MC9RS08KA2 Series block diagram with the ACMP highlighted.
Figure 10-1. MC9RS08KA2 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
PTA
V
SS
V
DD
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/V
PP
(1),( 2)
PTA3/ACMPO/BKGD/MS
ANALOG COMPARATOR
MODULE
MODULO TIMER
MODULE
PTA4/KBIP4
(1),(3)
PTA5/KBIP5
(1), (3)
INTERNAL REGULATOR
(KBI)
5
TCLK
ACMP-
ACMP+
ACMPO
(ICS)
(ACMP)
(MTIM)
USER FLASH
MC9RS08KA2 — 2048 BYTES
MC9RS08KA1 — 1024 BYTES