ATMEGA644PV-10AQ Atmel, ATMEGA644PV-10AQ Datasheet - Page 139
![MCU AVR 64K FLASH 10MHZ 44-TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA644PV-10AQ
Manufacturer Part Number
ATMEGA644PV-10AQ
Description
MCU AVR 64K FLASH 10MHZ 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644PV-10AQ
Core Processor
AVR
Core Size
8-Bit
Speed
10MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
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
44-TQFP, 44-VQFP
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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14. 8-bit Timer/Counter2 with PWM and Asynchronous Operation
14.1
14.2
8011O–AVR–07/10
Features
Overview
•
•
•
•
•
•
•
Timer/Counter2 is a general purpose, single channel, 8-bit Timer/Counter module.
A simplified block diagram of the 8-bit Timer/Counter is shown in Figure 13-12.. For the actual
placement of I/O pins, see
ing I/O bits and I/O pins, are shown in bold. The device-specific I/O Register and bit locations
are listed in the
The Power Reduction Timer/Counter2 bit, PRTIM2, in
page 48
Figure 14-1. 8-bit Timer/Counter Block Diagram
Single Channel Counter
Clear Timer on Compare Match (Auto Reload)
Glitch-free, Phase Correct Pulse Width Modulator (PWM)
Frequency Generator
10-bit Clock Prescaler
Overflow and Compare Match Interrupt Sources (TOV2, OCF2A and OCF2B)
Allows Clocking from External 32 kHz Watch Crystal Independent of the I/O Clock
must be written to zero to enable Timer/Counter2 module.
Status flags
”Register Description” on page
Timer/Counter
TCCRnA
OCRnA
TCNTn
OCRnB
=
=
”Pin Configurations” on page
Direction
Count
ASSRn
Clear
Synchronized Status flags
Control Logic
TOP
=
TCCRnB
asynchronous mode
Value
BOTTOM
Fixed
TOP
select (ASn)
clk
=
Tn
0
152.
ATmega164P/324P/644P
Prescaler
Synchronization Unit
OCnA
(Int.Req.)
OCnB
(Int.Req.)
Generation
Generation
2. CPU accessible I/O Registers, includ-
Waveform
Waveform
”PRR – Power Reduction Register” on
TOVn
(Int.Req.)
OCnA
OCnB
Oscillator
T/C
clk
I/O
clk
clk
I/O
ASY
TOSC1
TOSC2
139
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