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AT90PWM3 Datasheet(PDF) 227 Page - ATMEL Corporation

Part # AT90PWM3
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
PDF  361 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90PWM3 Datasheet(HTML) 227 Page - ATMEL Corporation

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228
4317I–AVR–01/08
AT90PWM2/3/2B/3B
Figure 20-1. Analog Comparator Block Diagram(1)(2)
Notes:
1. ADC multiplexer output: see Table 27 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 26 “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 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.
• Bit 5, 4– AC0IS1, AC0IS0: Analog Comparator 0 Interrupt Select bit
+
-
Interrupt Sensitivity Control
Analog Comparator 0 Interrupt
AC0IE
AC0IF
AC0O
AC0IS1
AC0IS0
+
-
Interrupt Sensitivity Control
Analog Comparator 1 Interrupt
AC1IE
T1 Capture Trigger
AC1ICE
AC1IF
AC1O
AC1IS1
AC1IS0
+
-
Interrupt Sensitivity Control
Analog Comparator 2 Interrupt
AC0IE
AC2IF
AC2O
AC2IS1
AC2IS0
ACMP0
ACMP1
ACMP2
AC2EN
/3.20
/2.13
/1.60
/6.40
ACMPM
Vref
DAC
AC0M
2 1 0
DAC
Result
AC1EN
AC0EN
AC1M
2 1 0
AC2M
2 1 0
Internal 2.56V
Reference
REFS0
REFS1
Aref
AVcc
DACEN
CLK I/O
CLK I/O
CLK I/O (/2)
(/2)
(/2)
Bit
7
6543
2
1
0
AC0EN
AC0IE
AC0IS1
AC0IS0
-
AC0M2
AC0M1
AC0M0
AC0CON
Read/Write
R/W
R/W
R/W
R/W
-
R/W
R/W
R/W
Initial Value
0
0000
0
0
0



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