ATTINY2313A-MUR Atmel, ATTINY2313A-MUR Datasheet - Page 68

• Manufacturer Part Number: ATTINY2313A-MUR
• Description: MCU AVR 2K FLASH 20MHZ 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY2313A-MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, 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): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

10.3
10.3.1
10.3.2
10.3.3
68
Register Description
ATtiny2313A/4313
MCUCR – MCU Control Register
PORTA – Port A Data Register
DDRA – Port A Data Direction Register
Table 10-10. Overriding Signals for Alternate Functions in PD3..PD0
• 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 55
Bit
0x35 (0x55)
Read/Write
Initial Value
Bit
0x1B (0x3B)
Read/Write
Initial Value
Bit
0x1A (0x3A)
Read/Write
Initial Value
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
AIO
PD3/INT1/
PCINT14
0
0
0
0
0
0
0
INT1 Enable +
PCINT14
PCINT14
INT1 Input/
PCINT14
–
PUD
R/W
R
R
7
–
0
7
–
0
0
7
SM1
R/W
R
R
6
–
0
6
–
0
6
0
PD2/INT0/XCK/CKOUT/
PCINT13
0
0
0
0
XCKO_PVOE
XCKO_PVOV
0
INT0 Enable/
XCK Input Enable/PCINT13
PCINT13
INT0 Input/XCK Input/
PCINT13
–
for more details about this feature.
R
R
5
0
5
0
–
–
R/W
SE
5
0
R
R
4
–
0
4
–
0
SM0
R/W
4
0
R
R
3
–
0
3
–
0
ISC11
R/W
3
0
PORTA2
PD1/TXD/
PCINT12
TXD_OE
0
TXD_OE
1
TXD_OE
TXD_PVOV
0
PCINT12
PCINT12
PCINT12
–
DDA2
R/W
R/W
2
0
2
0
ISC10
R/W
2
0
PORTA1
DDA1
R/W
R/W
ISC01
1
0
1
0
R/W
1
0
PD0/RXD/PCINT11
RXD_OE
PORTD0 • PUD
RXD_EN
0
0
0
0
PCINT11
PCINT11
RXD Input/PCINT11
–
PORTA0
DDA0
R/W
R/W
ISC00
R/W
0
0
0
0
0
0
8246A–AVR–11/09
PORTA
MCUCR
DDRA
“Con-