2. Pin Configurations
Figure 2-1. 20-pin packages.
AT90PWM81/161
AT90PWM81/161
SO20
(ACMP3_OUT/T1/PSCOUT23) PB0 1
(RESET/OCD/INT2) PE0 2
(PSCOUT20) PB1 3
(INT0/PSCOUT21) PB2 4
VCC 5
GND 6
(ACMP1_OUT/PSCIN2/XTAL1) PE1 7
(PSCINr/ACMP1M/XTAL2) PE2 8
(PSCOUTR0/PSCINrB) PD1 9
(ADC0/ACMP1) PD2 10
20 PB7 (ADC9/ICP1/PSCOUT22)
19 PB6 (ADC8/ACMP3/MISO)
18 PD6 (AMP0+)
17 PD5 (AMP0-/ADC7)
16 PE3/AREF/ADC6
15 AGND
14 AVCC
13 PB5 (ADC5/INT1/ACMP2/SCK)
12 PB4 (ADC3/ACMPM/MOSI)
11 PB3 (PSCOUTR1/ADC2/ACMP2M)
3
7734Q–AVR–02/12