ATMEGA32U4-MUR Atmel, ATMEGA32U4-MUR Datasheet - Page 106
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ATMEGA32U4-MUR
Manufacturer Part Number
ATMEGA32U4-MUR
Description
MCU AVR 16K FLASH 16MHZ 44VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16U4-MU.pdf
(433 pages)
Specifications of ATMEGA32U4-MUR
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-VQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA32U4-MUR
Manufacturer:
UCC
Quantity:
1 001
- Current page: 106 of 433
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13.8.3
13.8.4
13.8.5
13.8.6
7766F–AVR–11/10
Timer/Counter Register – TCNT0
Output Compare Register A – OCR0A
Output Compare Register B – OCR0B
Timer/Counter Interrupt Mask Register – TIMSK0
Table 13-9.
If external pin modes are used for the Timer/Counter0, transitions on the T0 pin will clock the
counter even if the pin is configured as an output. This feature allows software control of the
counting.
The Timer/Counter Register gives direct access, both for read and write operations, to the
Timer/Counter unit 8-bit counter. Writing to the TCNT0 Register blocks (removes) the Compare
Match on the following timer clock. Modifying the counter (TCNT0) while the counter is running,
introduces a risk of missing a Compare Match between TCNT0 and the OCR0x Registers.
The Output Compare Register A contains an 8-bit value that is continuously compared with the
counter value (TCNT0). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OC0A pin.
The Output Compare Register B contains an 8-bit value that is continuously compared with the
counter value (TCNT0). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OC0B pin.
• Bits 7..3, 0 – Res: Reserved Bits
These bits are reserved bits and will always read as zero.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
CS02
1
1
1
1
CS01
0
0
1
1
7
TCNT0[7:0]
R/W
0
7
R/W
0
7
R/W
0
7
–
R
0
Clock Select Bit Description (Continued)
CS00
0
1
0
1
6
R/W
0
6
R/W
0
6
R/W
0
6
–
R
0
Description
clk
clk
External clock source on T0 pin. Clock on falling edge.
External clock source on T0 pin. Clock on rising edge.
I/O
I/O
5
R/W
0
5
R/W
0
5
R/W
0
5
–
R
0
/256 (From prescaler)
/1024 (From prescaler)
4
R/W
0
4
R/W
0
4
R/W
0
4
–
R
0
OCR0A[7:0]
OCR0B[7:0]
3
0
3
0
3
0
3
–
R
0
R/W
R/W
R/W
2
R/W
0
2
R/W
0
2
R/W
0
2
OCIE0B
R/W
0
1
R/W
0
1
R/W
0
1
R/W
0
1
OCIE0A
R/W
0
ATmega16/32U4
0
R/W
0
0
R/W
0
0
R/W
0
0
TOIE0
R/W
0
TCNT0
OCR0A
OCR0B
TIMSK0
106
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