ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 82

• Manufacturer Part Number: ATmega32U4
• Manufacturer: Atmel Corporation

Specifications of ATmega32U4

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 14
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 26
• Ext Interrupts: 13
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 3.3
• 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: 4
• Output Compare Channels: 12
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

10.4
10.4.1
7766F–AVR–11/10
Register Description for I/O-Ports
Port B Data Register – PORTB
.
Table 10-14. Overriding Signals for Alternate Functions in PF7..PF4
Table 10-15. Overriding Signals for Alternate Functions in PF1..PF0
Bit
Read/Write
Initial Value
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
PF7/ADC7/TDI
JTAGEN
1
JTAGEN
0
0
0
JTAGEN
0
–
TDI/ADC7 INPUT
7
PORTB
7
R/W
0
PF1/ADC1
0
0
0
0
0
0
0
0
–
ADC1 INPUT
6
PORTB
6
R/W
0
5
PORTB
5
R/W
0
PF6/ADC6/TDO
JTAGEN
0
JTAGEN
SHIFT_IR +
SHIFT_DR
JTAGEN
TDO
JTAGEN
0
–
ADC6 INPUT
PF0/ADC0
0
0
0
0
0
0
0
0
–
ADC0 INPUT
4
PORTB
4
0
R/W
3
PORTB
3
R/W
0
PF5/ADC5/TMS
JTAGEN
1
JTAGEN
0
0
0
JTAGEN
0
–
TMS/ADC5
INPUT
2
PORTB
2
R/W
0
1
PORTB
1
R/W
0
ATmega16/32U4
PF4/ADC4/TCK
JTAGEN
1
JTAGEN
0
0
0
JTAGEN
0
–
TCK/ADC4
INPUT
0
PORTB
0
R/W
0
PORTB
82