ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 82
ATmega32U4
Manufacturer Part Number
ATmega32U4
Description
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
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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
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