MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 216

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

5V Analog Comparator (ACMPV1)
3.4
The ACMP has two analog input signals, ACMPP and ACMPM, and one digital output, ACMPO. The
associated pins are defined by the package option.
The ACMPP signal is connected to the non-inverting input of the comparator. The ACMPM signal is
connected to the inverting input of the comparator. Each of these signals can accept an input voltage that
varies across the full 5V operating voltage range. The module monitors the voltage on these inputs
independent of any other functions in use (GPIO, ADC).
The raw comparator output signal can optionally be driven on an external pin.
3.5
216
ACMPP
ACMPM
digital
buffer
input
1. Normal Mode
2. Shutdown Mode
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
The ACMP is operating when enabled and not in STOP mode.
The ACMP is held in shutdown mode either when disabled or during STOP mode. In this case the
supply of the analog block is disconnected for power saving. ACMPO drives zero in shutdown
mode.
External Signals
Modes of Operation
+
_
MC9S12G Family Reference Manual,
Figure 3-1. ACMP Block Diagram
Hold
Figure 3-2.
Sync
ACDIEN
ACO
ACE
ACMOD
Control & Status
Interrupt
Register
Control
Rev.1.01
SET ACIF
ACIE
ACIF
ACOPE
ACICE
Freescale Semiconductor
INTERNAL BUS
ACMP IRQ
To Input
Capture
Channel
ACMPO