ATMEGA128-16AU SL383 Atmel, ATMEGA128-16AU SL383 Datasheet - Page 112
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ATMEGA128-16AU SL383
Manufacturer Part Number
ATMEGA128-16AU SL383
Description
Manufacturer
Atmel
Datasheet
1.ATMEGA128-16AU_SL383.pdf
(386 pages)
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16-bit
Timer/Counter
(Timer/Counter
1 and
Timer/Counter3
)
Restrictions in
ATmega103
Compatibility Mode
Overview
112
ATmega128
The 16-bit Timer/Counter unit allows accurate program execution timing (event management),
wave generation, and signal timing measurement. The main features are:
•
•
•
•
•
•
•
•
•
•
•
Note that in ATmega103 compatibility mode, only one 16-bit Timer/Counter is available
(Timer/Counter1). Also note that in ATmega103 compatibility mode, the Timer/Counter1 has two
Compare Registers (Compare A and Compare B) only.
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 i.e., TCNT1 for accessing Timer/Counter1 counter value and so on.
A simplified block diagram of the 16-bit Timer/Counter is shown in
placement of I/O pins, refer to
including I/O bits and I/O pins, are shown in bold. The device-specific I/O Register and bit loca-
tions are listed in the
True 16-bit Design (i.e.,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
Ten Independent Interrupt Sources (TOV1, OCF1A, OCF1B, OCF1C, ICF1, TOV3, OCF3A, OCF3B,
OCF3C, and ICF3)
“16-bit Timer/Counter Register Description” on page
“Pin Configurations” on page
2. CPU accessible I/O Registers,
Figure
133.
46. For the actual
2467S–AVR–07/09
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