K60P100M100SF2RM Datasheet, PDF (855/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 35
Comparator (CMP)
35.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances see the chip configuration chapter.
The Comparator module (CMP) provides a circuit for comparing two analog input
voltages. The comparator circuit is designed to operate across the full range of the supply
voltage (rail to rail operation).
The Analog MUX (ANMUX) provides a circuit for selecting an analog input signal from
eight channels. One signal provided by the 6-bit DAC. The mux circuit is designed to
operate across the full range of the supply voltage.
The 6-bit DAC is 64-tap resistor ladder network which provides a selectable voltage
reference for applications where voltage reference is needed. The 64-tap resistor ladder
network divides the supply reference Vin into 64 voltage level. A 6-bit digital signal
input selects output voltage level, which varies from Vin to Vin/64. Vin can be selected
from two voltage sources, V_in1 and V_in2. The 6-bit DAC from a comparator is available
as an on-chip internal signal only and is not available externally to a pin.
35.2 CMP Features
The CMP has the following features:
• Operates over the entire supply range
• Inputs may range from rail to rail
• Programmable hysteresis control
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
855