AT90PWM2B-16SU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90PWM2B-16SU

8-bit Atmel Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

AT90PWM2/3/2B/3B

Figure 20-1. Analog Comparator Block Diagram(1)(2)

ACMP0

CLK I/O (/2)

+

-

AC0EN

Interrupt Sensitivity Control

AC0IS1 AC0IS0

AC0O

AC0IF

Analog Comparator 0 Interrupt

AC0IE

ACMP1

ACMP2

ACMPM

DAC

Vref

DAC

Result

Aref

AVcc

Internal 2.56V

Reference

DACEN

REFS0

REFS1

/1.60

/2.13

/3.20

/6.40

AC0M

210

CLK I/O (/2)

+

-

AC1EN

Interrupt Sensitivity Control

AC1IS1 AC1IS0

AC1M

210

CLK I/O (/2)

+

-

AC2EN

Interrupt Sensitivity Control

AC2IS1 AC2IS0

AC1O

AC1IF

Analog Comparator 1 Interrupt

AC1IE

T1 Capture Trigger

AC1ICE

AC2O

AC2IF

Analog Comparator 2 Interrupt

AC0IE

AC2M

210

Notes: 1. ADC multiplexer output: see Table 21-4 on page 248.

2. Refer to Figure 3-1 on page 3 and for Analog Comparator pin placement.

3. The voltage on Vref is defined in 21-3 “ADC Voltage Reference Selection” on page 247

20.2

Analog Comparator Register Description

Each analog comparator has its own control register.

A dedicated register has been designed to consign the outputs and the flags of the 3 analog

comparators.

20.2.1

Analog Comparator 0 Control Register – AC0CON

Bit

Read/Write

Initial Value

7

6

5

4

3

2

AC0EN

AC0IE

AC0IS1

AC0IS0

-

AC0M2

R/W

R/W

R/W

R/W

-

R/W

0

0

0

0

0

0

• Bit 7– AC0EN: Analog Comparator 0 Enable Bit

Set this bit to enable the analog comparator 0.

Clear this bit to disable the analog comparator 0.

• Bit 6– AC0IE: Analog Comparator 0 Interrupt Enable bit

Set this bit to enable the analog comparator 0 interrupt.

Clear this bit to disable the analog comparator 0 interrupt.

1

AC0M1

R/W

0

0

AC0M0

R/W

0

AC0CON

4317K–AVR–03/2013

228

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