Datasheet

229
4317K–AVR–03/2013
AT90PWM2/3/2B/3B
• Bit 5, 4– AC0IS1, AC0IS0: Analog Comparator 0 Interrupt Select bit
These 2 bits determine the sensitivity of the interrupt trigger.
The different setting are shown in Table 20-1.
• Bit 2, 1, 0– AC0M2, AC0M1, AC0M0: Analog Comparator 0 Multiplexer register
These 3 bits determine the input of the negative input of the analog comparator.
The different setting are shown in Table 20-2.
20.2.2 Analog Comparator 1Control Register – AC1CON
• Bit 7– AC1EN: Analog Comparator 1 Enable Bit
Set this bit to enable the analog comparator 1.
Clear this bit to disable the analog comparator 1.
• Bit 6– AC1IE: Analog Comparator 1 Interrupt Enable bit
Set this bit to enable the analog comparator 1 interrupt.
Clear this bit to disable the analog comparator 1 interrupt.
• Bit 5, 4– AC1IS1, AC1IS0: Analog Comparator 1 Interrupt Select bit
These 2 bits determine the sensitivity of the interrupt trigger.
The different setting are shown in Table 20-1.
Table 20-1. Interrupt sensitivity selection
AC0IS1 AC0IS0 Description
0 0 Comparator Interrupt on output toggle
01Reserved
1 0 Comparator interrupt on output falling edge
1 1 Comparator interrupt on output rising edge
Table 20-2. Analog Comparator 0 negative input selection
AC0M2 AC0M1 AC0M0 Description
000“Vref”/6.40
001“Vref”/3.20
010“Vref”/2.13
011“Vref”/1.60
100Analog Comparator Negative Input (ACMPM pin)
101DAC result
110Reserved
111Reserved
Bit 7 6543210
AC1EN AC1IE AC1IS1 AC1IS0 AC1ICE AC1M2 AC1M1 AC1M0 AC1CON
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value 0 0 0 0 0 0 0 0