1.1
Pin Descriptions
Table 1-1. Pin Out Description
QFN32 Pin
Number
Mnemonic
Type
Power
Power
Power
Name, Function and Alternate Function
Ground: 0V reference
5
20
4
GND
AGND
VCC
Analog Ground: 0V reference for analog part
Power Supply
Analog Power Supply: This is the power supply voltage for analog
part
19
AVCC
Power
For a normal use this pin must be connected.
Analog Reference: reference for analog converter. This is the
reference voltage of the A/D converter. As output, can be used by
external analog
21
AREF
Power
ISRC (Current Source Output)
MISO (SPI Master In Slave Out)
8
9
PB0
PB1
I/O
I/O
PSCOUT2A (PSC Module 2 Output A)
PCINT0 (Pin Change Interrupt 0)
MOSI (SPI Master Out Slave In)
PSCOUT2B (PSC Module 2 Output B)
PCINT1 (Pin Change Interrupt 1)
ADC5 (Analog Input Channel 5 )
INT1 (External Interrupt 1 Input)
16
PB2
I/O
ACMPN0 (analog comparator 0 Negative Input)
PCINT2 (Pin Change Interrupt 2)
AMP0- (Analog Differential Amplifier 0 Negative Input)
PCINT3 (Pin Change Interrupt 3)
AMP0+ (Analog Differential Amplifier 0 Positive Input)
PCINT4 (Pin Change Interrupt 4)
ADC6 (Analog Input Channel 6)
23
24
PB3
PB4
I/O
I/O
INT2 (External Interrupt 2 Input)
26
PB5
I/O
ACMPN1 (analog comparator 1 Negative Input)
AMP2- (Analog Differential Amplifier 2 Negative Input)
PCINT5 (Pin Change Interrupt 5)
ADC7 (Analog Input Channel 7)
27
28
30
PB6
PB7
PC0
I/O
I/O
I/O
PSCOUT1B (PSC Module 1 Output A)
PCINT6 (Pin Change Interrupt 6)
ADC4 (Analog Input Channel 4)
PSCOUT0B (PSC Module 0 Output B)
SCK (SPI Clock)
PCINT7 (Pin Change Interrupt 7)
PSCOUT1A (PSC Module 1 Output A)
INT3 (External Interrupt 3 Input)
PCINT8 (Pin Change Interrupt 8)
Note:
1. On the first engineering samples (Parts marked AT90PWM324), the ACMPN3 alternate function is not located
on PC4. It is located on PE2.
ATmega16/32/64/M1/C1 [DATASHEET]
5
7647O–AVR–01/15
MICROCHIP [ MICROCHIP ]
