ATMEGA32U4-AUR Atmel, ATMEGA32U4-AUR Datasheet - Page 171

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

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

15.12.8
15.12.9
15.12.10 OCR4C – Timer/Counter4 Output Compare Register C
7766F–AVR–11/10
OCR4A – Timer/Counter4 Output Compare Register A
OCR4B – Timer/Counter4 Output Compare Register B
• Bits 1:0 - TC49, TC48: Two MSB bits of the 10-bit accesses
If 10-bit accuracy is used, the Timer/Counter4 High Byte Register (TC4H) is used for temporary
storing the MSB bits (TC49, TC48) of the 10-bit accesses. The same TC4H register is shared
between all 10-bit registers within the Timer/Counter4. Note that special procedures must be fol-
lowed when accessing the 10-bit TCNT4 register via the 8-bit AVR data bus. These procedures
are described in section
The output compare register A is an 8-bit read/write register.
The Timer/Counter Output Compare Register A contains data to be continuously compared with
Timer/Counter4. Actions on compare matches are specified in TCCR4A. A compare match does
only occur if Timer/Counter4 counts to the OCR4A value. A software write that sets TCNT4 and
OCR4A to the same value does not generate a compare match.
A compare match will set the compare interrupt flag OCF4A after a synchronization delay follow-
ing the compare event.
Note that, if 10-bit accuracy is used special procedures must be followed when accessing the
internal 10-bit Output Compare Registers via the 8-bit AVR data bus. These procedures are
described in section
The output compare register B is an 8-bit read/write register.
The Timer/Counter Output Compare Register B contains data to be continuously compared with
Timer/Counter4. Actions on compare matches are specified in TCCR4. A compare match does
only occur if Timer/Counter4 counts to the OCR4B value. A software write that sets TCNT4 and
OCR4B to the same value does not generate a compare match.
A compare match will set the compare interrupt flag OCF4B after a synchronization delay follow-
ing the compare event.
Note that, if 10-bit accuracy is used special procedures must be followed when accessing the
internal 10-bit Output Compare Registers via the 8-bit AVR data bus. These procedures are
described in section
Bit
Read/Write
Initial value
Bit
Read/Write
Initial value
Bit
Read/Write
Initial value
MSB
MSB
MSB
R/W
R/W
R/W
7
0
7
0
7
1
“Accessing 10-Bit Registers” on page
“Accessing 10-Bit Registers” on page
“Accessing 10-Bit Registers” on page
R/W
R/W
R/W
6
0
6
0
6
1
R/W
R/W
R/W
5
0
5
0
5
1
R/W
R/W
R/W
4
0
4
0
4
1
R/W
R/W
R/W
3
0
3
0
3
1
159.
159.
R/W
R/W
R/W
159.
2
0
2
0
2
1
ATmega16/32U4
R/W
R/W
R/W
1
0
1
0
1
1
LSB
LSB
LSB
R/W
R/W
R/W
0
0
0
0
0
1
OCR44C
OCR4A
OCR4B
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