AT90PWM216-16SE ATMEL [ATMEL Corporation], AT90PWM216-16SE Datasheet - Page 233

• Manufacturer Part Number: AT90PWM216-16SE
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable flash
• Manufacturer: ATMEL [ATMEL Corporation]

20.2.4
7710D–AVR–08/09
Analog Comparator Status Register – ACSR
• Bit 6– AC2IE: Analog Comparator 2 Interrupt Enable bit
Set this bit to enable the analog comparator 2 interrupt.
Clear this bit to disable the analog comparator 2 interrupt.
• Bit 5, 4– AC2IS1, AC2IS0: Analog Comparator 2 Interrupt Select bit
These 2 bits determine the sensitivity of the interrupt trigger.
The different setting are shown in
Table 20-5.
• Bit 2, 1, 0– AC2M2, AC2M1, AC2M0: Analog Comparator 2 Multiplexer register
These 3 bits determine the input of the negative input of the analog comparator.
The different setting are shown in
Table 20-6.
Bit
Read/Write
Initial Value
• Bit 7– ACCKDIV: Analog Comparator Clock Divider
The analog comparators can work with a clock up to 8MHz@3V and 16MHz@5V.
Set this bit in case the clock frequency of the microcontroller is higher than 8 MHz to insert a
divider by 2 between the clock of the microcontroller and the clock of the analog comparators.
Clear this bit to have the same clock frequency for the microcontroller and the analog
comparators.
• Bit 6– AC2IF: Analog Comparator 2 Interrupt Flag Bit
This bit is set by hardware when comparator 2 output event triggers off the interrupt mode
defined by AC2IS1 and AC2IS0 bits in AC2CON register.
AC2IS1
0
0
1
1
AC2M2
0
0
0
0
1
1
1
1
Interrupt sensitivity selection
Analog Comparator 2 negative input selection
ACCKDIV
AC2IS0
0
1
0
1
AC2M1
0
0
1
1
0
0
1
1
R/W
7
0
AC2IF
R/W
6
0
Description
Comparator Interrupt on output toggle
Reserved
Comparator interrupt on output falling edge
Comparator interrupt on output rising edge
AC2M0
0
1
0
1
0
1
0
1
AC1IF
Table
Table
R/W
5
0
20-1.
20-6.
Description
“Vref”/6.40
“Vref”/3.20
“Vref”/2.13
“Vref”/1.60
Analog Comparator Negative Input (ACMPM pin)
DAC result
Reserved
Reserved
AC0IF
R/W
4
0
3
0
-
-
AC2O
AT90PWM216/316
R
2
0
AC1O
R
1
0
AC0O
R
0
0
ACSR
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