ATMEGA16U2-16AU Atmel, ATMEGA16U2-16AU Datasheet - Page 87

• Manufacturer Part Number: ATMEGA16U2-16AU
• Description: 8-bit Microcontrollers - MCU 16K Flash
• Manufacturer: Atmel

Specifications of ATMEGA16U2-16AU

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: AVR
• Data Bus Width: 8 bit
• Program Memory Size: 16 KB
• Data Ram Size: 1.25 KB
• Data Rom Size: 512 B
• Program Memory Type: Flash
• Factory Pack Quantity: 1250

13.2.7
13.2.8
7799D–AVR–11/10
PCMSK0 – Pin Change Mask Register 0
PCMSK1 – Pin Change Mask Register 1
• Bit 1:0 – PCIF[1:0]: Pin Change Interrupt Flag 1:0
When a logic change on any PCINT[12:8]/[7:0] pin triggers an interrupt request, PCIF1/0
becomes set (one). If the I-bit in SREG and the PCIE1/0 bit in EIMSK are set (one), the MCU will
jump to the corresponding Interrupt Vector. The flag is cleared when the interrupt routine is exe-
cuted. Alternatively, the flag can be cleared by writing a logical one to it.
• Bit 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 PCICR 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 4:0 – PCINT[12:8]: Pin Change Enable Mask 12:8
Each PCINT[12:8] bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT[12:8] is set and the PCIE1 bit in PCICR is set, pin change interrupt is enabled on
the corresponding I/O pin. If PCINT[12:8] is cleared, pin change interrupt on the corresponding
I/O pin is disabled.
Bit
(0x6B)
Read/Write
Initial Value
Bit
(0x6C)
Read/Write
Initial Value
PCINT7
R/W
R
7
0
7
0
-
PCINT6
R/W
R
6
0
6
0
-
PCINT5
R/W
R/W
5
0
5
0
-
PCINT12
PCINT4
R/W
R/W
4
0
4
0
PCINT11
PCINT3
ATmega8U2/16U2/32U2
R/W
R/W
0
0
3
3
PCINT10
PCINT2
R/W
R/W
2
0
2
0
PCINT1
PCINT9
R/W
R/W
1
0
1
0
PCINT0
PCINT8
R/W
R/W
0
0
0
0
PCMSK0
PCMSK1
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