ATMEGA128-16AI Atmel, ATMEGA128-16AI Datasheet - Page 161

IC AVR MCU 128K 16MHZ 64-TQFP

ATMEGA128-16AI

Manufacturer Part Number
ATMEGA128-16AI
Description
IC AVR MCU 128K 16MHZ 64-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA128-16AI

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)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
Q1167170A

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Timing Example
2467V–AVR–02/11
When the modulator is enabled the type of modulation (logical AND or OR) can be selected by
the PORTB7 Register. Note that the DDRB7 controls the direction of the port independent of the
COMnx1:0 bit setting.
Figure 74
in fast PWM mode (non-inverted) and Timer/Counter2 uses CTC waveform mode with toggle
Compare Output mode (COMnx1:0 = 1).
Figure 74. Output Compare Modulator, Timing Diagram
In this example, Timer/Counter2 provides the carrier, while the modulating signal is generated
by the Output Compare unit C of the Timer/Counter1.
The resolution of the PWM signal (OC1C) is reduced by the modulation. The reduction factor is
equal to the number of system clock cycles of one period of the carrier (OC2). In this example
the resolution is reduced by a factor of two. The reason for the reduction is illustrated in
74
high time is one cycle longer than the period 3 high time, but the result on the PB7 output is
equal in both periods.
at the second and third period of the PB7 output when PORTB7 equals zero. The period 2
(FPWM Mode)
(PORTB7 = 0)
(PORTB7 = 1)
(CTC Mode)
(Period)
OC1C
illustrates the modulator in action. In this example the Timer/Counter1 is set to operate
clk
OC2
PB7
PB7
I/O
1
2
ATmega128
3
Figure
161

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