ATtiny461A Atmel Corporation, ATtiny461A Datasheet - Page 53

• Manufacturer Part Number: ATtiny461A
• Manufacturer: Atmel Corporation

Specifications of ATtiny461A

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• 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: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

9.3.4
9.3.5
8197C–AVR–05/11
PCMSK0 – Pin Change Mask Register A
PCMSK1 – Pin Change Mask Register B
• Bit 5 – PCIF: Pin Change Interrupt Flag
When a logic change on any PCINT15 pin triggers an interrupt request, PCIF becomes set
(one). If the I-bit in SREG and the PCIE 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.
• Bits 4:0 – Res: Reserved Bits
These bits are reserved and will always read as zero.
• 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 PCIE1 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.
• Bits 7:0 – PCINT[15:8]: Pin Change Enable Mask 15:8
Each PCINT[15:8] bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT[11:8] is set and the PCIE0 bit in GIMSK is set, pin change interrupt is enabled on
the corresponding I/O pin, and if PCINT[15:12] is set and the PCIE1 bit in GIMSK is set, pin
change interrupt is enabled on the corresponding I/O pin. If PCINT[15:8] is cleared, pin change
interrupt on the corresponding I/O pin is disabled.
Bit
0x23 (0x43)
Read/Write
Initial Value
Bit
0x22 (0x42)
Read/Write
Initial Value
PCINT15
PCINT7
R/W
R/W
7
1
7
1
PCINT14
PCINT6
R/W
R/W
6
1
6
1
PCINT13
PCINT5
R/W
R/W
5
0
5
1
PCINT12
PCINT4
R/w
R/w
4
0
4
1
PCINT11
PCINT3
ATtiny261A/461A/861A
R/W
R/W
3
1
3
1
PCINT10
PCINT2
R/W
R/W
2
0
2
1
PCINT1
PCINT9
R/W
R/W
1
0
1
1
PCINT0
PCINT8
R/W
R/W
0
0
0
1
PCMSK0
PCMSK1
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