mc9s08rd60fj Freescale Semiconductor, Inc, mc9s08rd60fj Datasheet - Page 178

• Manufacturer Part Number: mc9s08rd60fj
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Analog Comparator (ACMP) Module
13.1 Features
The ACMP has the following features:
13.2 Block Diagram
The block diagram for the analog comparator module is shown below.
13.3 Pin Description
The ACMP has two analog input pins: ACMP1– and ACMP1+. Each of these pins can accept an input
voltage that varies across the full operating voltage range of the MCU. When the ACMP1+ is configured
to use the internal bandgap reference, ACMP1+ is available to be as general-purpose I/O. As shown in the
block diagram, the ACMP1+ pin is connected to the comparator non-inverting input if ACBGS is equal to
logic 0, and the ACMP1– pin is connected to the inverting input of the comparator.
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ACMP1–
Full rail-to-rail supply operation.
Less than 40 mV of input offset.
Selectable interrupt on rising edge, falling edge, or either rising or falling edge of comparator
output.
Option to compare to fixed internal bandgap reference voltage.
ACMP1+
REFERENCE
INTERNAL
Figure 13-2 Analog Comparator Module Block Diagram
+
–
MC9S08RC/RD/RE/RG
ACBGS
ACPE
STATUS & CONTROL
INTERNAL BUS
REGISTER
INTERRUPT
CONTROL
ACIE
ACF
Freescale Semiconductor
AC IRQ