Table 1-1.
Pin out description (Continued)
QFN32 Pin
Number
Mnemonic
Type
Name, Function & Alternate Function
ADC1 (Analog Input Channel 1)
RXD (UART Rx data)
RXLIN (LIN Receive Input)
12
PD4
I/O
ICP1A (Timer 1 input capture alternate A input)
SCK_A (Programming & alternate SPI Clock)
PCINT20 (Pin Change Interrupt 20)
ADC2 (Analog Input Channel 2)
13
14
PD5
PD6
I/O
I/O
ACMP2 (Analog Comparator 2 Positive Input )
PCINT21 (Pin Change Interrupt 21)
ADC3 (Analog Input Channel 3 )
ACMPN2 (Analog Comparator 2 Negative Input)
INT0 (External Interrupt 0 Input)
PCINT22 (Pin Change Interrupt 22)
ACMP0 (Analog Comparator 0 Positive Input )
PCINT23 (Pin Change Interrupt 23)
15
31
PD7
PE0
I/O
RESET (Reset Input)
I/O or I
OCD (On Chip Debug I/O)
PCINT24 (Pin Change Interrupt 24)
XTAL1 (XTAL Input)
10
11
PE1
PE2
I/O
I/O
OC0B (Timer 0 Output Compare B)
PCINT25 (Pin Change Interrupt 25)
XTAL2 (XTAL Output)
ADC0 (Analog Input Channel 0)
PCINT26 (Pin Change Interrupt 26)
Note:
1. Only for ATmega32/64M1.
2. On the first engineering samples (Parts marked AT90PWM324), the ACMPN3 alternate func-
tion is not located on PC4. It is located on PE2.
2. Overview
The ATmega16/32/64/M1/C1 is a low-power CMOS 8-bit microcontroller based on the AVR
enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the
ATmega16/32/64/M1/C1 achieves throughputs approaching 1 MIPS per MHz allowing the sys-
tem designer to optimize power consumption versus processing speed.
8
ATmega16/32/64/M1/C1
7647DS–AVR–08/08
ATMEL [ ATMEL ]
