ATMEGA645V-8MU Atmel, ATMEGA645V-8MU Datasheet - Page 85

• Manufacturer Part Number: ATMEGA645V-8MU
• Description: IC AVR MCU FLASH 64K 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645V-8MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K 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
• Processor Series: ATMEGA64x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, UART, USI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14. 8-bit Timer/Counter0 with PWM
14.1
14.2
14.2.1
2570M–AVR–04/11
Features
Overview
Definitions
Timer/Counter0 is a general purpose, single compare unit, 8-bit Timer/Counter module. The
main features are:
•
•
•
•
•
•
•
A simplified block diagram of the 8-bit Timer/Counter is shown in
placement of I/O pins, refer to
ATmega325/645” on page
shown in bold. The device-specific I/O Register and bit locations are listed in the
Description” on page
Figure 14-1. 8-bit Timer/Counter Block Diagram
Many register and bit references in this section are written in general form. A lower case “n”
replaces the Timer/Counter number, in this case 0. A lower case “x” replaces the Output Com-
pare unit number, in this case unit A. However, when using the register or bit defines in a
program, the precise form must be used, i.e., TCNT0 for accessing Timer/Counter0 counter
value and so on.
Single Compare Unit Counter
Clear Timer on Compare Match (Auto Reload)
Glitch-free, Phase Correct Pulse Width Modulator (PWM)
Frequency Generator
External Event Counter
10-bit Clock Prescaler
Overflow and Compare Match Interrupt Sources (TOV0 and OCF0A)
Timer/Counter
TCNTn
OCRn
=
96.
3. CPU accessible I/O Registers, including I/O bits and I/O pins, are
direction
count
clear
BOTTOM
= 0
“Pinout ATmega3250/6450” on page 2
Control Logic
=
TCCRn
TOP
0xFF
ATmega325/3250/645/6450
clk
Tn
Generation
Waveform
Clock Select
( From Prescaler )
Detector
Edge
Figure
14-1. For the actual
and
OCn
(Int.Req.)
TOVn
(Int.Req.)
OCn
Tn
“Register
“Pinout
85