ATMEGA32U4-AU Atmel, ATMEGA32U4-AU Datasheet - Page 139

• Manufacturer Part Number: ATMEGA32U4-AU
• Description: MCU AVR 32K FLASH 16MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32U4-AU

• 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
• Processor Series: ATMEGA32x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2.5 KB
• Interface Type: SPI/TWI/USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 26
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12-ch x 10-bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Total Internal Ram Size: 2.5KB
• # I/os (max): 26
• Number Of Timers - General Purpose: 5
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: TQFP
• Controller Family/series: AVR MEGA
• No. Of I/o's: 26
• Eeprom Memory Size: 1KB
• Ram Memory Size: 2.5KB
• Cpu Speed: 16MHz
• Rohs Compliant: Yes
• For Use With: ATSTK524 - KIT STARTER ATMEGA32M1/MEGA32C1ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATMEGA32U4-16AU; ATMEGA32U4-16AU

15.2.1
15.2.2
7766F–AVR–11/10
Speed
Accuracy
Figure 15-1. Timer/Counter4 Block Diagram
The maximum speed of the Timer/Counter4 is 64 MHz. However, if a supply voltage below 4
volts is used, it is recommended to decrease the input frequency, because the Timer/Counter4
is not running fast enough on low voltage levels.
The Timer/Counter4 is a 10-bit Timer/Counter module that can alternatively be used as an 8-bit
Timer/Counter. The Timer/Counter4 registers are basically 8-bit registers, but on top of that
there is a 2-bit High Byte Register (TC4H) that can be used as a common temporary buffer to
access the two MSBs of the 10-bit Timer/Counter4 registers by the AVR CPU via the 8-bit data
bus, if the 10-bit accuracy is used. Whereas, if the two MSBs of the 10-bit registers are written to
zero the Timer/Counter4 is working as an 8-bit Timer/Counter. When reading the low byte of any
8-bit register the two MSBs are written to the TC4H register, and when writing the low byte of
any 8-bit register the two MSBs are written from the TC4H register. Special procedures must be
followed when accessing the 10-bit Timer/Counter4 values via the 8-bit data bus. These proce-
dures are described in the section
The Enhanced PWM mode allows to add a resolution bit to each Compare register A/B/D, while
the output frequency remains identical to a Normal PWM mode. That means that the TC4H reg-
ister contains one more bit that will be the MSB in a 11-bits enhanced PWM operation. See the
section
use it.
REGISTER (TIMSK4)
TOV4
T/C INT. MASK
TIMER/COUNTER4
(TCNT4)
8-BIT OUTPUT COMPARE
COMPARE REGISTER A
REGISTER A (OCR4A)
10-BIT COMPARATOR
10-BIT OUTPUT
“Enhanced Compare/PWM mode” on page 148
OCF4A
OCF4B
T/C INT. FLAG
REGISTER (TIFR4)
CLK
COUNT
CLEAR
DIRECTION
OCF4D
8-BIT OUTPUT COMPARE
REGISTER B (OCR4B)
COMPARE REGISTER B
10-BIT COMPARATOR
10-BIT OUTPUT
DEAD TIME GENERATOR
OC4A
REGISTER A (TCCR4A)
“Accessing 10-Bit Registers” on page
T/C CONTROL
8-BIT DATABUS
OC4A
8-BIT OUTPUT COMPARE
REGISTER C (OCR4C)
COMPARE REGISTER C
10-BIT COMPARATOR
10-BIT OUTPUT
DEAD TIME GENERATOR
T/C CONTROL
OC4B
REGISTER B (TCCR4B)
TIMER/COUNTER4 CONTROL LOGIC
for details about this feature and how to
OC4B
8-BIT OUTPUT COMPARE
COMPARE REGISTER D
REGISTER D (OCR4D)
10-BIT OUTPUT
10-BIT COMPARATOR
T/C CONTROL
REGISTER C (TCCR4C)
ATmega16/32U4
DEAD TIME GENERATOR
OC4D
159.
OC4D
2-BIT HIGH BYTE
REGISTER (TC4H)
T/C CONTROL
T/C CONTROL
REGISTER C (TCCR4D)
REGISTER D (TCCR4E)
FAULT_PROTECTION
139