ATMEGA2561V-8MI Atmel, ATMEGA2561V-8MI Datasheet - Page 136
![IC AVR MCU 256K 8MHZ 64-QFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
ATMEGA2561V-8MI
Manufacturer Part Number
ATMEGA2561V-8MI
Description
IC AVR MCU 256K 8MHZ 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA2561V-8MI
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
256KB (128K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-MLF®, 64-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA2561V-8MI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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16. 16-bit Timer/Counter (Timer/Counter 1, 3, 4, and 5)
16.1
16.2
2549M–AVR–09/10
Features
Overview
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The 16-bit Timer/Counter unit allows accurate program execution timing (event management),
wave generation, and signal timing measurement.
Most register and bit references in this section are written in general form. A lower case “n”
replaces the Timer/Counter number, and a lower case “x” replaces the Output Compare unit
channel. However, when using the register or bit defines in a program, the precise form must be
used, that is, TCNT1 for accessing Timer/Counter1 counter value and so on.
A simplified block diagram of the 16-bit Timer/Counter is shown in
the actual placement of I/O pins, see
“Pinout ATmega1281/2561” on page
pins, are shown in bold. The device-specific I/O Register and bit locations are listed in the
ister Description” on page
The Power Reduction Timer/Counter1 bit, PRTIM1, in
page 56
The Power Reduction Timer/Counter3 bit, PRTIM3, in
page 57
The Power Reduction Timer/Counter4 bit, PRTIM4, in
page 57
The Power Reduction Timer/Counter5 bit, PRTIM5, in
page 57
Timer/Counter4 and Timer/Counter5 only have full functionality in the ATmega640/1280/2560.
Input capture and output compare are not available in the ATmega1281/2561.
True 16-bit Design (that is, allows 16-bit PWM)
Three independent Output Compare Units
Double Buffered Output Compare Registers
One Input Capture Unit
Input Capture Noise Canceler
Clear Timer on Compare Match (Auto Reload)
Glitch-free, Phase Correct Pulse Width Modulator (PWM)
Variable PWM Period
Frequency Generator
External Event Counter
Twenty independent interrupt sources (TOV1, OCF1A, OCF1B, OCF1C, ICF1, TOV3, OCF3A,
OCF3B, OCF3C, ICF3, TOV4, OCF4A, OCF4B, OCF4C, ICF4, TOV5, OCF5A, OCF5B, OCF5C and
ICF5)
must be written to zero to enable Timer/Counter1 module.
must be written to zero to enable Timer/Counter3 module.
must be written to zero to enable Timer/Counter4 module.
must be written to zero to enable Timer/Counter5 module.
158.
ATmega640/1280/1281/2560/2561
4. CPU accessible I/O Registers, including I/O bits and I/O
“TQFP-pinout ATmega640/1280/2560” on page 2
“PRR0 – Power Reduction Register 0” on
“PRR1 – Power Reduction Register 1” on
“PRR1 – Power Reduction Register 1” on
“PRR1 – Power Reduction Register 1” on
Figure 16-1 on page
137. For
“Reg-
and
136
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