Datasheet

195
7734Q–AVR–02/12
AT90PWM81/161
Figure 16-1. Analog comparator block diagram.
Notes: 1. Refer to Figure 2-1 on page 3 and Figure 2-2 on page 4 for Analog Comparator pin placement.
2. The voltage on V
REF
is defined in Table 17-3, “ADC voltage reference selection.,” on
page 218.
+
-
Interrupt Sensitivity Control
Analog Comparator 1 Interrupt
AC1IE
T1 Capture Trigger
AC1ICE
AC1IF
AC1O (to PSCR)
AC1IS1 AC1IS0
+
-
Interrupt Sensitivity Control
Analog Comparator 2 Interrupt
AC2IE
AC2IF
AC2O (to PSC2)
AC2IS1 AC2IS0
ACMP1
ACMP2
AC2EN
/3.20
/2.13
/1.60
/6.40
ACMPM3
AC1EN
AC1M
2 1 0
AC2M
2 1 0
Internal 2.56V
Reference
REFS1 REFS0
+REFS1
Aref
AVcc
+
-
Interrupt Sensitivity Control
Analog Comparator 3 Interrupt
AC3IE
AC3IF
AC3IS1
AC3IS0
AC3EN
AC3M
2 1 0
ACMP3
ACMPM2
ACMPM1
ACMP1_OUT
ACMPM
Vref DAC 10
DAC
Result
DACEN
ACMP2_OUT
ACMP3_OUT
AC1OE
AC2OE
AC3OE
AC1H
2 1 0
AC2H
2 1 0
AC3H
2 1 0
AC3O (to PSC2)
ACMP3_OUT_A
AC3OEA
AC2OI
AC1OI
AC3OI
Band Gap
Band Gap
Band Gap
REFS0
Vref