ATTINY861A-PU Atmel, ATTINY861A-PU Datasheet - Page 52
ATTINY861A-PU
Manufacturer Part Number
ATTINY861A-PU
Description
IC, MCU, 8BIT, 8K FLASH, 20PDIP
Manufacturer
Atmel
Datasheet
1.ATTINY461A-MU.pdf
(292 pages)
Specifications of ATTINY861A-PU
Controller Family/series
ATtiny
No. Of I/o's
16
Eeprom Memory Size
512Byte
Ram Memory Size
512Byte
Cpu Speed
20MHz
No.
RoHS Compliant
Core Size
8bit
Program Memory Size
8KB
Oscillator Type
External, Internal
Rohs Compliant
Yes
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9.3.4
9.3.5
52
ATtiny261A/461A/861A
PCMSK0 – Pin Change Mask Register A
PCMSK1 – Pin Change Mask Register B
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 – PCINT7:0: Pin Change Enable Mask 7:0
Each PCINT7:0 bit selects whether pin change interrupt is enabled on the corresponding I/O pin.
If PCINT7:0 is set and the PCIE1 bit in GIMSK is set, pin change interrupt is enabled on the cor-
responding I/O pin. If PCINT7:0 is cleared, pin change interrupt on the corresponding I/O pin is
disabled.
• Bits 7:0 – PCINT15:8: Pin Change Enable Mask 15:8
Each PCINT15:8 bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT11:8 is set and the PCIE0 bit in GIMSK is set, pin change interrupt is enabled on
the corresponding I/O pin, and if PCINT15:12 is set and the PCIE1 bit in GIMSK is set, pin
change interrupt is enabled on the corresponding I/O pin. If PCINT15:8 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
7
PCINT7
R/W
1
7
PCINT15
R/W
1
6
PCINT6
R/W
1
6
PCINT14
R/W
1
5
PCINT5
R/W
0
5
PCINT13
R/W
1
4
PCINT4
R/w
0
4
PCINT12
R/w
1
3
PCINT3
R/W
1
3
PCINT11
R/W
1
2
R/W
0
2
PCINT10
R/W
1
PCINT2
1
PCINT1
R/W
0
1
PCINT9
R/W
1
0
PCINT0
R/W
0
0
PCINT8
R/W
1
8197B–AVR–01/10
PCMSK0
PCMSK1
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