ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 138

• 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

15. 10-bit High Speed Timer/Counter4
15.1
15.2
7766F–AVR–11/10
Features
Overview
•
•
•
•
•
•
•
•
•
•
•
Timer/Counter4 is a general purpose high speed Timer/Counter module, with three independent
Output Compare Units, and with enhanced PWM support.
The Timer/Counter4 features a high resolution and a high accuracy usage with the lower pres-
caling opportunities. It can also support three accurate and high speed Pulse Width Modulators
using clock speeds up to 64 MHz. In PWM mode Timer/Counter4 and the output compare regis-
ters serve as triple stand-alone PWMs with non-overlapping, non-inverted and inverted outputs.
The enhanced PWM mode allows to get one more accuracy bit while keeping the frequency
identical to normal mode (a PWM 8 bits accuracy in enhanced mode outputs the same fre-
quency that a PWM 7 bits accuracy in normal mode). Similarly, the high prescaling opportunities
make this unit useful for lower speed functions or exact timing functions with infrequent actions.
A lock feature allows user to update the PWM registers and
A simplified block diagram of the Timer/Counter4 is shown in
of the I/O pins, refer to
register and bit locations are listed in the
Up to 10-Bit Accuracy
Three Independent Output Compare Units
Clear Timer on Compare Match (Auto Reload)
Glitch Free, Phase and Frequency Correct Pulse Width Modulator (PWM)
Enhanced PWM mode: one optional additional accuracy bit without effect on output frequency
Variable PWM Period
Independent Dead Time Generators for each PWM channels
Synchronous update of PWM registers
Five Independent Interrupt Sources (TOV4, OCF4A, OCF4B, OCF4D, FPF4)
High Speed Asynchronous and Synchronous Clocking Modes
Separate Prescaler Unit
“Pinout ATmega16U4/ATmega32U4” on page
“Register Description” on page
Figure
ATmega16/32U4
15-1. For actual placement
3. The device-specific I/O
162.
138