mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 164

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Analog Comparator (ACMPV3)
8.2
The ACMP has two analog input pins, ACMPx+ and ACMPx- and one digital output pin ACMPxO. Each
of these pins can accept an input voltage that varies across the full operating voltage range of the MCU.
As shown in
ACMPx+ pin is connected to the comparator non-inverting input if ACBGS is a 0. As shown in
the ACMPxO pin can be enabled to drive an external pin.
The signal properties of ACMP are shown in
8-4
ACMPx+
ACMPx-
Reference
Internal
External Signal Description
Figure
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
8-1, the ACMPx- pin is connected to the inverting input of the comparator, and the
ACMPxO
ACMPx+
ACMPx-
Signal
Figure 8-1. Analog Comparator 5 V Block Diagram
Comparator
+
-
Inverting analog input to the ACMP.
(Minus input)
Non-inverting analog input to the ACMP.
(Positive input)
Digital output of the ACMP.
Table 8-1. Signal Properties
ACBGS
ACME
Table
Function
8-1.
Status & Control
Internal Bus
Register
Interrupt
Control
I/O
O
I
I
ACIE
ACOPE
ACF
Freescale Semiconductor
ACMPx
INTERRUPT
REQUEST
ACMPxO
Figure
8-1,