mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 677

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Chapter 30
Comparator (CMP)
30.1 Introduction
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
as an on-chip internal signal only and is not available externally to a pin.
30.2 CMP Features
The CMP has the following features:
Freescale Semiconductor, Inc.
• Operates over the entire supply range
• Inputs may range from rail to rail
• Programmable hysteresis control
• Selectable interrupt on rising edge, falling edge, or both rising or falling edges of
• Selectable inversion on comparator output
• Comparator output may be:
comparator output
MCF51JF128 Reference Manual, Rev. 2, 03/2011
in1
and V
in2
. The 6-bit DAC from a comparator is available
Preliminary
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