ATMEGA32U4-AUR Atmel, ATMEGA32U4-AUR Datasheet - Page 109
![MCU AVR 16K FLASH 16MHZ 44TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA32U4-AUR
Manufacturer Part Number
ATMEGA32U4-AUR
Description
MCU AVR 16K FLASH 16MHZ 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16U4-MU.pdf
(433 pages)
Specifications of ATMEGA32U4-AUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
26
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2.5K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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14.1.1
7766F–AVR–11/10
Registers
Figure 14-1. 16-bit Timer/Counter Block Diagram
Note:
The Timer/Counter (TCNTn), Output Compare Registers (OCRnA/B/C), and Input Capture Reg-
ister (ICRn) are all 16-bit registers. Special procedures must be followed when accessing the 16-
bit registers. These procedures are described in the section
page
CPU access restrictions. Interrupt requests (shorten as Int.Req.) signals are all visible in the
Timer Interrupt Flag Register (TIFRn). All interrupts are individually masked with the Timer Inter-
rupt Mask Register (TIMSKn). TIFRn and TIMSKn are not shown in the figure since these
registers are shared by other timer units.
The Timer/Counter can be clocked internally, via the prescaler, or by an external clock source on
the Tn pin. The Clock Select logic block controls which clock source and edge the Timer/Counter
uses to increment (or decrement) its value. The Timer/Counter is inactive when no clock source
is selected. The output from the clock select logic is referred to as the timer clock (clk
110. The Timer/Counter Control Registers (TCCRnA/B/C) are 8-bit registers and have no
1. Refer to
2. Tn only refers to T1 since T3 input is not available on the ATmega16U4/ATmega32U4
10-6 on page 75
product
.
“Pinout ATmega16U4/ATmega32U4” on page
Timer/Counter
OCRnB
TCCRnA
for Timer/Counter1 and 3 and 3 pin placement and description.
OCRnA
OCRnC
TCNTn
ICRn
=
=
=
Direction
Count
Clear
Control Logic
TOP
=
TCCRnB
Values
BOTTOM
Fixed
TOP
(1)
ICFn (Int.Req.)
TCLK
Detector
Edge
=
0
3,
“Accessing 16-bit Registers” on
Table 10-3 on page
ATmega16/32U4
OCFnA
(Int.Req.)
OCFnB
(Int.Req.)
OCFnC
(Int.Req.)
TOVn
(Int.Req.)
Clock Select
Generation
Generation
Generation
( From Prescaler )
Waveform
Waveform
Waveform
TCCRnC
Canceler
Detector
Noise
Edge
Comparator Ouput )
( From Analog
72, and
OCnA
OCnB
OCnC
ICPn
Tn
(2)
T
n
).
Table
109
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