ATMEGA32A-ANR Atmel, ATMEGA32A-ANR Datasheet - Page 133
![IC MCU AVR 32K FLASH 44TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA32A-ANR
Manufacturer Part Number
ATMEGA32A-ANR
Description
IC MCU AVR 32K FLASH 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA32A-MU.pdf
(353 pages)
Specifications of ATMEGA32A-ANR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K 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
44-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8155C–AVR–02/11
A FOC2 strobe will not generate any interrupt, nor will it clear the timer in CTC mode using
OCR2 as TOP.
The FOC2 bit is always read as zero.
• Bit 6, 3 – WGM2[1:0]: Waveform Generation Mode
These bits control the counting sequence of the counter, the source for the maximum (TOP)
counter value, and what type of waveform generation to be used. Modes of operation supported
by the Timer/Counter unit are: Normal mode, Clear Timer on Compare match (CTC) mode, and
two types of Pulse Width Modulation (PWM) modes. See
on page
Table 17-2.
Note:
• Bit 5:4 – COM2[1:0]: Compare Match Output Mode
These bits control the Output Compare pin (OC2) behavior. If one or both of the COM21:0 bits
are set, the OC2 output overrides the normal port functionality of the I/O pin it is connected to.
However, note that the Data Direction Register (DDR) bit corresponding to OC2 pin must be set
in order to enable the output driver.
When OC2 is connected to the pin, the function of the COM21:0 bits depends on the WGM21:0
bit setting.
normal or CTC mode (non-PWM).
Table 17-3.
Mode
0
1
2
3
COM21
0
0
1
1
1. The CTC2 and PWM2 bit definition names are now obsolete. Use the WGM21:0 definitions.
124.
WGM21
Table 17-3
(CTC2)
However, the functionality and location of these bits are compatible with previous versions of
the timer.
0
0
1
1
Waveform Generation Mode Bit Description
Compare Output Mode, non-PWM Mode
COM20
WGM20
(PWM2)
0
1
0
1
shows the COM21:0 bit functionality when the WGM21:0 bits are set to a
0
1
0
1
Description
Normal port operation, OC2 disconnected.
Toggle OC2 on compare match
Clear OC2 on compare match
Set OC2 on compare match
Timer/Counter Mode of
Operation
Normal
PWM, Phase Correct
CTC
Fast PWM
Table 17-2
(1)
TOP
0xFF
0xFF
OCR2
0xFF
and
Update of
OCR2
Immediate
Immediate
BOTTOM
TOP
ATmega32A
“Modes of Operation”
TOV2 Flag
Set on
MAX
BOTTOM
MAX
MAX
133
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