ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 79
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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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12.3.3
7799D–AVR–11/10
Alternate Functions of Port D
The Port D pins with alternate functions are shown in
Table 12-9.
The alternate pin configuration is as follows:
•
HWB, Hardware Boot : The PD7 pin can serve as
TO, Timer/Counter0 counter source.
INT7, External Interrupt source 7: The PD7 pin can serve as an external interrupt source to the
MCU.
CTS, USART1 Transmitter Flow Control. This pin can control the transmitter in function of its
state.
•
INT6, External Interrupt source 6: The PD6 pin can serve as an external interrupt source to the
MCU.
RTS, USART1 Receiver Flow Control. This pin can control the receiver in function of its state.
•
XCK1, USART1 External Clock : The data direction register DDRD5 controls whether the clock
is output (DDRD5 set) or input (DDRD5 cleared). The XCK1 pin is active only when the USART1
operates in Synchronous Mode.
PCINT12, Pin Change Interrupt source 12: The PD5 pin can serve as an external interrupt
source.
•
INT5, External Interrupt source 5: The PD4 pin can serve as an external interrupt source to the
MCU.
•
INT3, External Interrupt source 3: The PD3 pin can serve as an external interrupt source to the
MCU.
HWB/TO/INT7/CTS
INT6/RTS
XCK1/PCINT12
INT5
INT3/TXD1
Port Pin
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
, Bit 4
,Bit 6
, Bit 3
Port D Pins Alternate Functions
Alternate Function
HWB/TO/INT7/CTS
INT6/RTS
XCK1/PCINT12 (USART1 External Clock Input/Output)
INT5
INT3/TXD1 (External Interrupt3 Input or USART1 Transmit Pin)
INT2/AIN1/RXD1(External Interrupt2 Input or USART1 Receive Pin)
INT1/AIN0 (External Interrupt1 Input)
INT0/OC0B (External Interrupt0 Input)
, Bit 5
, Bit 7
ATmega8U2/16U2/32U2
Table
12-9.
79
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