mc9rs08ka2 Freescale Semiconductor, Inc, mc9rs08ka2 Datasheet - Page 82

• Manufacturer Part Number: mc9rs08ka2
• Description: Rs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Chapter 10 Analog Comparator (RS08ACMPV1)
10.1.1
The ACMP has the following features:
10.1.2
This section defines the ACMP operation in wait, stop, and background debug modes.
10.1.2.1
The ACMP continues to operate in wait mode if enabled before executing the WAIT instruction. Therefore,
the ACMP can be used to bring the MCU out of wait mode if the ACMP interrupt is enabled (ACIE = 1).
For lowest possible current consumption, the ACMP should be disabled by software if not required as an
interrupt source during wait mode.
10.1.2.2
The ACMP continues to operate in stop mode if enabled and compare operation remains active. If ACOPE
is enabled, comparator output operates as in the normal operating mode and comparator output is placed
onto the external pin. The MCU is brought out of stop when a compare event occurs and ACIE is enabled;
ACF flag sets accordingly.
If stop is exited with a reset, the ACMP will be put into its reset state.
10.1.2.3
When the MCU is in active background mode, the ACMP will continue to operate normally.
10.1.3
The block diagram for the analog comparator module is shown in
82
•
•
•
•
•
•
•
Full rail-to-rail supply operation
Less than 40 mV of input offset
Less than 15 mV of hysteresis
Selectable interrupt on rising edge, falling edge, or either rising or falling edges of comparator
output
Option to compare to fixed internal bandgap reference voltage
Option to allow comparator output to be visible on a pin, ACMPO
Remains operational in stop mode
Features
Modes of Operation
Block Diagram
Operation in Wait Mode
Operation in Stop Mode
Operation in Active Background Mode
MC9RS08KA2 Series Data Sheet, Rev. 3
Figure
10-2.
Freescale Semiconductor