Features
•
High Performance, Low Power AVR
®
8-Bit Microcontroller
•
Advanced RISC Architecture
– 120 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 20 MIPS Throughput at 20 MHz
Data and Non-volatile Program and Data Memories
– 2/4K Bytes of In-System Self Programmable Flash
• Endurance 10,000 Write/Erase Cycles
– 128/256 Bytes In-System Programmable EEPROM
• Endurance: 100,000 Write/Erase Cycles
– 128/256 Bytes Internal SRAM
– Programming Lock for Flash Program and EEPROM Data Security
Peripheral Features
– One 8-bit Timer/Counter with Separate Prescaler and Compare Mode
– One 16-bit Timer/Counter with Separate Prescaler, Compare and Capture Modes
– Four PWM Channels
– On-chip Analog Comparator
– Programmable Watchdog Timer with On-chip Oscillator
– USI – Universal Serial Interface
– Full Duplex USART
Special Microcontroller Features
– debugWIRE On-chip Debugging
– In-System Programmable via SPI Port
– External and Internal Interrupt Sources
– Low-power Idle, Power-down, and Standby Modes
– Enhanced Power-on Reset Circuit
– Programmable Brown-out Detection Circuit
– Internal Calibrated Oscillator
I/O and Packages
– 18 Programmable I/O Lines
– 20-pin PDIP, 20-pin SOIC, 20-pad MLF/VQFN
Operating Voltage
– 1.8 – 5.5V
Speed Grades
– 0 – 4 MHz @ 1.8 – 5.5V
– 0 – 10 MHz @ 2.7 – 5.5V
– 0 – 20 MHz @ 4.5 – 5.5V
Industrial Temperature Range: -40°C to +85°C
Low Power Consumption
– Active Mode
• 190 µA at 1.8V and 1MHz
– Idle Mode
• 24 µA at 1.8V and 1MHz
– Power-down Mode
• 0.1 µA at 1.8V and +25°C
•
•
8-bit
Microcontroller
with 2/4K Bytes
In-System
Programmable
Flash
ATtiny2313A
ATtiny4313
Summary
•
•
•
•
•
•
Rev. 8246BS–AVR–09/11
1. Pin Configurations
Figure 1-1.
Pinout ATtiny2313A/4313
PDIP/SOIC
(PCINT10/RESET/dW) PA2
(PCINT11/RXD) PD0
(PCINT12/TXD) PD1
(PCINT9/XTAL2) PA1
(PCINT8/CLKI/XTAL1) PA0
(PCINT13/CKOUT/XCK/INT0) PD2
(PCINT14/INT1) PD3
(PCINT15/T0) PD4
(PCINT16/OC0B/T1) PD5
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VCC
PB7 (USCK/SCL/SCK/PCINT7)
PB6 (MISO/DO/PCINT6)
PB5 (MOSI/DI/SDA/PCINT5)
PB4 (OC1B/PCINT4)
PB3 (OC1A/PCINT3)
PB2 (OC0A/PCINT2)
PB1 (AIN1/PCINT1)
PB0 (AIN0/PCINT0)
PD6 (ICPI/PCINT17)
MLF/VQFN
PB7 (USCK/SCL/SCK/PCINT7)
17
PA2 (RESET/dW/PCINT10)
PB6 (MISO/DO/PCINT6)
16
15
14
13
12
11
10
6
7
8
9
PD0 (RXD/PCINT11)
20
19
(PCINT12/TXD) PD1
(PCINT9/XTAL2) PA1
(PCINT8/CLKI/XTAL1) PA0
(PCINT13/CKOUT/XCK/INT0) PD2
(PCINT14/INT1) PD3
1
2
3
4
5
18
VCC
PB5 (MOSI/DI/SDA/PCINT5)
PB4 (OC1B/PCINT4)
PB3 (OC1A/PCINT3)
PB2 (OC0A/PCINT2)
PB1 (AIN1/PCINT1)
(PCINT17/ICPI) PD6
NOTE: Bottom pad should be soldered to ground.
2
ATtiny2313A/4313
8246BS–AVR–09/11
(PCINT16/OC0B/T1) PD5
(AIN0/PCINT0) PB0
(PCINT15/T0) PD4
GND
ATtiny2313A/4313
1.1
1.1.1
Pin Descriptions
VCC
Digital supply voltage.
1.1.2
GND
Ground.
1.1.3
Port A (PA2..PA0)
Port A is a 3-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port A output buffers have symmetrical drive characteristics with both high sink and source
capability, except PA2 which has the RESET capability. To use pin PA2 as I/O pin, instead of
RESET pin, program (“0”) RSTDISBL fuse. As inputs, Port A pins that are externally pulled low
will source current if the pull-up resistors are activated. The Port A pins are tri-stated when a
reset condition becomes active, even if the clock is not running.
Port A also serves the functions of various special features of the ATtiny2313A/4313 as listed on
page 61.
1.1.4
Port B (PB7..PB0)
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.
Port B also serves the functions of various special features of the ATtiny2313A/4313 as listed on
page 62.
1.1.5
Port D (PD6..PD0)
Port D is a 7-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port D output buffers have symmetrical drive characteristics with both high sink and source
capability. As inputs, Port D pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port D pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port D also serves the functions of various special features of the ATtiny2313A/4313 as listed on
page 66.
1.1.6
RESET
Reset input. A low level on this pin for longer than the minimum pulse length will generate a
reset, even if the clock is not running and provided that the reset pin has not been disabled. The
minimum pulse length is given in
Table 22-3 on page 201.
Shorter pulses are not guaranteed to
generate a reset. The Reset Input is an alternate function for PA2 and dW.
The reset pin can also be used as a (weak) I/O pin.
1.1.7
XTAL1
Input to the inverting Oscillator amplifier and input to the internal clock operating circuit. XTAL1
is an alternate function for PA0.
3
8246BS–AVR–09/11
1.1.8
XTAL2
Output from the inverting Oscillator amplifier. XTAL2 is an alternate function for PA1.
4
ATtiny2313A/4313
8246BS–AVR–09/11
ATtiny2313A/4313
2. Overview
The ATtiny2313A/4313 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
ATtiny2313A/4313 achieves throughputs approaching 1 MIPS per MHz allowing the system
designer to optimize power consumption versus processing speed.
2.1
Block Diagram
Figure 2-1.
Block Diagram
XTAL1
PA0 - PA2
XTAL2
PORTA DRIVERS
VCC
DATA REGISTER
PORTA
DATA DIR.
REG. PORTA
INTERNAL
CALIBRATED
OSCILLATOR
8-BIT DATA BUS
GND
PROGRAM
COUNTER
STACK
POINTER
INTERNAL
OSCILLATOR
OSCILLATOR
WATCHDOG
TIMER
MCU CONTROL
REGISTER
MCU STATUS
REGISTER
TIMING AND
CONTROL
RESET
PROGRAM
FLASH
SRAM
ON-CHIP
DEBUGGER
INSTRUCTION
REGISTER
GENERAL
PURPOSE
REGISTER
TIMER/
COUNTERS
INTERRUPT
UNIT
INSTRUCTION
DECODER
EEPROM
CONTROL
LINES
ALU
USI
STATUS
REGISTER
PROGRAMMING
LOGIC
SPI
USART
ANALOG
COMPARATOR
DATA REGISTER
PORTB
DATA DIR.
REG. PORTB
DATA REGISTER
PORTD
DATA DIR.
REG. PORTD
PORTB DRIVERS
PORTD DRIVERS
PB0 - PB7
PD0 - PD6
5
8246BS–AVR–09/11
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