ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 87
ATmega32U2
Manufacturer Part Number
ATmega32U2
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U2
Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
22
Ext Interrupts
20
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
5
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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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
3
0
3
0
PCINT10
PCINT2
R/W
R/W
2
0
2
0
PCINT1
PCINT9
R/W
R/W
1
0
1
0
PCINT8
PCINT0
R/W
R/W
0
0
0
0
PCMSK0
PCMSK1
87
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