Datasheet

Figure 5-3. MLF Top View
1
2
3
4
32 31 30 29 28 27 26
5
6
7
8
24
23
22
21
20
19
18
17
25
9
10 11 12 13 14 15 16
PD0 (RXD) PD1 (TXD) PD2 (INT0) PC6 (RESET)
PC2 (ADC2) PC3 (ADC3) PC4 (ADC4/SDA) PC5 (ADC5/SCL)
PC0 (ADC0)
PC1 (ADC1)
GND
ADC6
AVCC
PB5 (SCK)
AREF
ADC7
(INT1) PD3
(XCK/T0) PD4
GND
VCC
GND
VCC
(XTAL1/TOSC1) PB6
(XTAL2/TOSC2) PB7
(T1) PD5
(AIN0) PD6 (AIN1) PD7
(ICP1) PB0
(OC1A) PB1
(SS/OC1B) PB2
(MOSI/OC2) PB3
(MISO) PB4
NOTE:
The large center pad underneath
the MLF packages is made of
metal and internally connected to
GND. It should be soldered or
glued to the PCB to ensure good
mechanical stability. If the center
pad is left unconneted, the
package might loosen from the
PCB.
5.1 Pin Descriptions
5.1.1 V
CC
Digital supply voltage.
5.1.2 GND
Ground.
5.1.3 Port B (PB7:PB0) – XTAL1/XTAL2/TOSC1/TOSC2
Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port B
output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs,
Port B pins that are externally pulled low will source current if the pull-up resistors are activated. The Port
B pins are tri-stated when a reset condition becomes active, even if the clock is not running.
AVR 8-Bit Microcontroller
Pin Configurations
© 2017 Microchip Technology Inc.
Datasheet Complete
40001974A-page 15