ATTINY2313-20SI Atmel, ATTINY2313-20SI Datasheet - Page 53

• Manufacturer Part Number: ATTINY2313-20SI
• Description: IC MCU AVR 2K FLASH 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY2313-20SI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: ATTINY2313-24SI; ATTINY2313-24SI

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