Acmp In Stop Mode - NXP Semiconductors MC9S08SU16 Reference Manual

ACMP in stop mode

Module
Module Instances:
• One
18.2 ACMP in stop mode
ACMP continues to operate in stop mode if enabled. If ACMP_CS[ACOPE] is enabled,
comparator output will operate as in the normal operating mode. The MCU is brought out
of stop when a compare event occurs and ACMP_CS[ACIE] is enabled; ACF flag sets
accordingly.
18.4 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
four 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.
290
Table 18-1. CMP module signals Connection
(continued)
Signal
Window/sample
6-bit DAC Vin1
6-bit DAC Vin2
Internal clock
and V . The 6-bit DAC from a comparator is available
in1 in2
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
Connect to
XBAR_OUT13
VREFH (a PMC high accuracy
reference)
VDDX
BUSCLK
NXP Semiconductors