ATtiny2313 Atmel Corporation, ATtiny2313 Datasheet - Page 53

• Manufacturer Part Number: ATtiny2313
• Manufacturer: Atmel Corporation

Specifications of ATtiny2313

• Flash (kbytes): 2 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 18
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

MCU Control Register
– MCUCR
Alternate Functions of
Port A
Alternate Functions of
Port B
2543L–AVR–08/10
• Bit 7 – PUD: Pull-up Disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See
figuring the Pin” on page 47
The Port A pins with alternate functions are as shown in
Table 24. Port A Pins Alternate Functions
The Port B pins with alternate functions are shown in
Table 25. Port B Pins Alternate Functions
The alternate pin configuration is as follows:
• USCK/SCL/PCINT7 - Port B, Bit 7
USCK: Three-wire mode Universal Serial Interface Clock.
SCL: Two-wire mode Serial Clock for USI Two-wire mode.
PCINT7: Pin Change Interrupt source 7. The PB7 pin can serve as an external interrupt source.
• DO/PCINT6 - Port B, Bit 6
DO: Three-wire mode Universal Serial Interface Data output. Three-wire mode Data output over-
rides PORTB6 value and it is driven to the port when data direction bit DDB6 is set (one).
However the PORTB6 bit still controls the pull-up enabling pull-up, if direction is input and
PORTB6 is set (one).
PCINT6: Pin Change Interrupt Source 6. The PB6 pin can serve as an external interrupt source.
Bit
Read/Write
Initial Value
Port Pin
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
Port Pin
PA2
PA1
PA0
Alternate Functions
USCK/SCL/PCINT7
DO/PCINT6
DI/SDA/PCINT5
OC1B/PCINT4
OC1A/PCINT3
OC0A/PCINT2
AIN1/PCINT1
AIN0/PCINT0
PUD
R/W
7
0
SM1
R/W
6
0
Alternate Function
RESET, dW
XTAL2
XTAL1
for more details about this feature.
R/W
SE
5
0
SM0
R/W
4
0
ISC11
R/W
3
0
Table
Table
ISC10
R/W
2
0
25.
5.
ISC01
R/W
1
0
ISC00
R/W
0
0
MCUCR
“Con-
53