ATMEGA128A-ANR Atmel, ATMEGA128A-ANR Datasheet - Page 93

• Manufacturer Part Number: ATMEGA128A-ANR
• Description: IC MCU AVR 128K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA128A-ANR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Core: AVR8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14. 8-bit Timer/Counter0 with PWM and Asynchronous Operation
14.1
14.2
8151H–AVR–02/11
Features
Overview
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Timer/Counter0 is a general purpose, single channel, 8-bit Timer/Counter module. A simplified
block diagram of the 8-bit Timer/Counter is shown in
I/O pins, refer to
and I/O pins, are shown in bold. The device-specific I/O register and bit locations are listed in the
“Register Description” on page
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 (TOV0 and OCF0)
Allows Clocking from External 32kHz Watch Crystal Independent of the I/O Clock
Status flags
“Pin Configurations” on page
Timer/Counter
TCNTn
OCRn
=
ASSRn
direction
count
clear
BOTTOM
106.
Synchronized Status flags
= 0
Control Logic
=
TCCRn
TOP
asynchronous mode
0xFF
select (ASn)
2. CPU accessible I/O registers, including I/O bits
clk
Tn
Synchronization Unit
Figure
OCn
(Int.Req.)
Generation
Prescaler
Waveform
14-1. For the actual placement of
ATmega128A
Oscillator
T/C
clk
TOVn
(Int.Req.)
clk
clk
OCn
ASY
I/O
I/O
TOSC2
TOSC1
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