ATTINY2313A-SUR Atmel, ATTINY2313A-SUR Datasheet - Page 52

• Manufacturer Part Number: ATTINY2313A-SUR
• Description: MCU AVR 2KB FLASH 20MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY2313A-SUR

• 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: -

9.3.4
9.3.5
52
ATtiny2313A/4313
PCMSK2 – Pin Change Mask Register 2
PCMSK1 – Pin Change Mask Register 1
Alternatively, the flag can be cleared by writing a logical one to it. This flag is always cleared
when INT1 is configured as a level interrupt.
• Bit 6 – INTF0: External Interrupt Flag 0
When an edge or logic change on the INT0 pin triggers an interrupt request, INTF0 becomes set
(one). If the I-bit in SREG and the INT0 bit in GIMSK are set (one), the MCU will jump to the cor-
responding Interrupt Vector. The flag is cleared when the interrupt routine is executed.
Alternatively, the flag can be cleared by writing a logical one to it. This flag is always cleared
when INT0 is configured as a level interrupt.
• Bit 5 – PCIF0: Pin Change Interrupt Flag 0
When a logic change on any PCINT7..0 pin triggers an interrupt request, PCIF becomes set
(one). If the I-bit in SREG and the PCIE0 bit in GIMSK are set (one), the MCU will jump to the
corresponding Interrupt Vector. The flag is cleared when the interrupt routine is executed. Alter-
natively, the flag can be cleared by writing a logical one to it.
• Bit 4 – PCIF2: Pin Change Interrupt Flag 2
When a logic change on any PCINT17..11 pin triggers an interrupt request, PCIF2 becomes set
(one). If the I-bit in SREG and the PCIE2 bit in GIMSK are set (one), the MCU will jump to the
corresponding Interrupt Vector. The flag is cleared when the interrupt routine is executed. Alter-
natively, the flag can be cleared by writing a logical one to it.
• Bit 3 – PCIF1: Pin Change Interrupt Flag 1
When a logic change on any PCINT10..8 pin triggers an interrupt request, PCIF1 becomes set
(one). If the I-bit in SREG and the PCIE1 bit in GIMSK are set (one), the MCU will jump to the
corresponding Interrupt Vector. The flag is cleared when the interrupt routine is executed. Alter-
natively, the flag can be cleared by writing a logical one to it.
• Bit 7 – Res: Reserved Bit
These bits are reserved and will always read as zero.
• Bits 6..0 – PCINT17..11: Pin Change Enable Mask 17..11
Each PCINT17..11 bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT17..11 is set and the PCIE1 bit in GIMSK is set, pin change interrupt is enabled on
the corresponding I/O pin. If PCINT17..11 is cleared, pin change interrupt on the corresponding
I/O pin is disabled.
Bit
0x05 (0x25)
Read/Write
Initial Value
Bit
0x04 (0x24)
Read/Write
Initial Value
R
7
–
0
R
7
–
0
PCINT17
R/W
6
0
R
6
–
0
PCINT16
R/W
5
0
R
5
–
0
PCINT15
R/W
4
0
R
4
–
0
PCINT14
R/W
3
0
3
–
R
0
PCINT13
PCINT10
R/W
R/W
2
0
2
0
PCINT12
PCINT9
R/W
R/W
1
0
1
0
PCINT11
PCINT8
R/W
R/W
0
0
0
0
8246A–AVR–11/09
PCMSK2
PCMSK1