attiny25v ATMEL Corporation, attiny25v Datasheet - Page 2

• Manufacturer Part Number: attiny25v
• Description: Microcontroller With 2/4/8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

1. Pin Configurations
Figure 1-1.
1.1
1.1.1
1.1.2
1.1.3
2
(PCINT4/XTAL2/CLKO/OC1B/ADC2) PB4
(PCINT3/XTAL1/CLKI/OC1B/ADC3) PB3
(PCINT4/XTAL2/CLKO/OC1B/ADC2) PB4
(PCINT3/XTAL1/CLKI/OC1B/ADC3) PB3
Pin Descriptions
(PCINT5/RESET/ADC0/dW) PB5
ATtiny25/45/85
VCC
GND
Port B (PB5..PB0)
Pinout ATtiny25/45/85
(PCINT5/RESET/ADC0/dW) PB5
Supply voltage.
Ground.
Port B is a 6-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.
Port B also serves the functions of various special features of the ATtiny25/45/85 as listed in
“Alternate Functions of Port B” on page
On ATtiny25, the programmable I/O ports PB3 and PB4 (pins 2 and 3) are exchanged in
ATtiny15 Compatibility Mode for supporting the backward compatibility with ATtiny15.
NOTE: Bottom pad should be soldered to ground.
DNC: Do Not Connect
DNC
DNC
GND
1
2
3
4
5
PDIP/SOIC
QFN/MLF
1
2
3
4
8
7
6
5
15
14
13
12
11
VCC
PB2 (SCK/USCK/SCL/ADC1/T0/INT0/PCINT2)
PB1 (MISO/DO/AIN1/OC0B/OC1A/PCINT1)
PB0 (MOSI/DI/SDA/AIN0/OC0A/OC1A/AREF/PCINT0)
61.
VCC
PB2 (SCK/USCK/SCL/ADC1/T0/INT0/PCINT2)
DNC
PB1 (MISO/DO/AIN1/OC0B/OC1A/PCINT1)
PB0 (MOSI/DI/SDA/AIN0/OC0A/OC1A/AREF/PCINT0)
2586K–AVR–01/08