ATMEGA32A-ANR Atmel, ATMEGA32A-ANR Datasheet - Page 85
![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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Manufacturer
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8155C–AVR–02/11
Table 14-2.
Note:
• Bit 5:4 – COM0[1:0]: Compare Match Output Mode
These bits control the Output Compare pin (OC0) behavior. If one or both of the COM01:0 bits
are set, the OC0 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 the OC0 pin must be
set in order to enable the output driver.
When OC0 is connected to the pin, the function of the COM01:0 bits depends on the WGM01:0
bit setting.
normal or CTC mode (non-PWM).
Table 14-3.
Table 14-4
mode.
Table 14-4.
Note:
Table 14-5
rect PWM mode.
Mode
COM01
0
1
2
3
COM01
0
0
1
1
0
0
1
1
1. The CTC0 and PWM0 bit definition names are now obsolete. Use the WGM01:0 definitions.
1. A special case occurs when OCR0 equals TOP and COM01 is set. In this case, the compare
Table 14-3
WGM01
However, the functionality and location of these bits are compatible with previous versions of
the timer.
match is ignored, but the set or clear is done at BOTTOM. See
for more details.
shows the COM0[1:0] bit functionality when the WGM01:0 bits are set to phase cor-
(CTC0)
shows the COM01:0 bit functionality when the WGM01:0 bits are set to fast PWM
0
0
1
1
Waveform Generation Mode Bit Description
Compare Output Mode, non-PWM Mode
Compare Output Mode, Fast PWM Mode
COM00
COM00
0
1
0
1
0
1
0
1
shows the COM01:0 bit functionality when the WGM01:0 bits are set to a
WGM00
(PWM0)
0
1
0
1
Description
Normal port operation, OC0 disconnected.
Reserved
Clear OC0 on compare match, set OC0 at BOTTOM,
(nin-inverting mode)
Set OC0 on compare match, clear OC0 at BOTTOM,
(inverting mode)
Description
Normal port operation, OC0 disconnected.
Toggle OC0 on compare match
Clear OC0 on compare match
Set OC0 on compare match
Timer/Counter Mode of
Operation
Normal
PWM, Phase Correct
CTC
Fast PWM
(1)
(1)
TOP
0xFF
0xFF
OCR0
0xFF
“Fast PWM Mode” on page 79
Update of
OCR0
Immediate
TOP
Immediate
BOTTOM
ATmega32A
TOV0 Flag
Set-on
MAX
BOTTOM
MAX
MAX
85
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