ACMP

Analog Comparators (ACMP) Peripheral Driver. More...

Collaboration diagram for ACMP:

Modules
	xACMP
	CoX ACMP Peripheral Interface.

---

Detailed Description

Analog Comparators (ACMP) Peripheral Driver.

An analog comparator is a peripheral that compares two analog voltages and provides a logical output that signals the comparison result.

CoX defines the comparator output is:

• a logical one(H) when positive input greater than negative input(C+ > C-).
• a logical zer(L). when (C+ < C-) .o

Each comparator can be configured to cause an interrupt when the comparator output value changes.

The comparator can provide its output to a device pin, acting as a replacement for an analog comparator on the board. In addition, the comparator can signal the application via interrupts.

The Analog Comparators (ACMP) API provides a set of functions for dealing with the ACMP.

Functions are provided to configure the ACMP, and handle the interrupt.

Contents

• 1. ACMP Physical Block
• 2. ACMP Functional Description
  • 2.1 ACMP Peripheral Pin Description
  • 2.2 ACMP Analog Input Source
  • 2.3 ACMP Output
  • 2.4 ACMP Interrupt and Event

1. ACMP Physical Block

2. ACMP Functional Description

2.1 ACMP Peripheral Pin Description

//! +----------------+------------------------------------------------+
//! |Pin Name        |Pin Description                                 |
//! |----------------|------------------------------------------------|
//! |CMPnN(Cn-)      |Analog Comparator n Negative input Pin.         |
//! |----------------|------------------------------------------------|
//! |CMPnP(Cn+)      |Analog Comparator n Positive input Pin.         |
//! |----------------|------------------------------------------------|
//! |CMPnO(Cno)      |Analog Comparator n Output Pin.                 |
//! +----------------+------------------------------------------------+
//! 

2.2 ACMP Analog Input Source

The ACMP- input can be:

• Cn- (external pin).
• one of the internal Vref.

The ACMP+ input can be:

• Cn+ (exernal pin).
• one of the internal Vref.

2.3 ACMP Output

CoX defines the comparator output(Cno):

• Cn+ > Cn- Cno output logic 1 (H).
• Cn+ < Cn- Cno output logic 0 (L).

2.4 ACMP Interrupt and Event

CoX defines the comparator interrupt: only when the Cno output changed, the moudle generates an interrupt.

Note:

Here describes the common function of the ACMP Peripheral. The CoX Peripheral Interface is base on the functions above.