ATTINY20-XUR Atmel, ATTINY20-XUR Datasheet - Page 43

• Manufacturer Part Number: ATTINY20-XUR
• Description: MCU AVR 2KB FLASH 12MHZ 14TSSOP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY20-XUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

9.3.4
9.3.5
8235B–AVR–04/11
PCMSK1 – Pin Change Mask Register 1
PCMSK0 – Pin Change Mask Register 0
• Bits 7:4 – Res: Reserved Bits
These bits are reserved and will always read as zero.
• Bits 3:0 – PCINT[11:8] : Pin Change Enable Mask 11:8
Each PCINT[11:8] bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT[11:8] is set and the PCIE1 bit in GIMSK is set, pin change interrupt is enabled on
the corresponding I/O pin. If PCINT[11:8] is cleared, pin change interrupt on the corresponding
I/O pin is disabled.
• Bits 7:0 – PCINT[7:0] : Pin Change Enable Mask 7:0
Each PCINT[7:0] bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT[7:0] is set and the PCIE0 bit in GIMSK is set, pin change interrupt is enabled on
the corresponding I/O pin. If PCINT[7:0] is cleared, pin change interrupt on the corresponding
I/O pin is disabled.
Bit
0x0A
Read/Write
Initial Value
Bit
0x09
Read/Write
Initial Value
PCINT7
R/W
R
7
–
0
7
0
PCINT6
R
R/W
6
–
0
6
0
PCINT5
R
5
–
0
R/W
5
0
PCINT4
R
4
–
0
R/W
4
0
PCINT11
R/W
PCINT3
3
0
R/W
3
0
PCINT10
PCINT2
R/W
R/W
2
0
2
0
PCINT9
PCINT1
R/W
R/W
1
0
1
0
PCINT0
PCINT8
ATtiny20
R/W
R/W
0
0
0
0
PCMSK0
PCMSK1
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