ATMEGA1284P-AUR Atmel, ATMEGA1284P-AUR Datasheet - Page 134

• Manufacturer Part Number: ATMEGA1284P-AUR
• Description: MCU AVR 128KB FLASH 20MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA1284P-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8272A–AVR–01/10
Table 15-3 on page 134
the fast PWM mode.
Table 15-3.
Note:
Table 15-4 on page 134
the phase correct or the phase and frequency correct, PWM mode.
Table 15-4.
Note:
• Bit 1:0 – WGMn1:0: Waveform Generation Mode
Combined with the WGMn3:2 bits found in the TCCRnB Register, these bits control the counting
sequence of the counter, the source for maximum (TOP) counter value, and what type of wave-
form generation to be used, see
Timer/Counter unit are: Normal mode (counter), Clear Timer on Compare match (CTC) mode,
and three types of Pulse Width Modulation (PWM) modes.
164A/164PA/324A/324PA/644A/644PA/1284/1284P
COMnA1/COMnB1
COMnA1/COMnB1
1. A special case occurs when OCRnA/OCRnB equals TOP and COMnA1/COMnB1 is set. In
1. A special case occurs when OCRnA/OCRnB equals TOP and COMnA1/COMnB1 is set.
0
0
1
1
0
0
1
1
this case the compare match is ignored, but the set or clear is done at BOTTOM.
“15.9.3” on page 125.
Section “15.9.4” on page 127.
Compare Output Mode, Fast PWM
Compare Output Mode, Phase Correct and Phase and Frequency Correct
PWM
(1)
shows the COMnx1:0 bit functionality when the WGMn3:0 bits are set to
shows the COMnx1:0 bit functionality when the WGMn3:0 bits are set to
COMnA0/COMnB0
COMnA0/COMnB0
for more details.
0
1
0
1
0
1
0
1
Table 15-5 on page
for more details.
Description
Normal port operation, OCnA/OCnB disconnected.
WGMn3:0 = 14 or 15: Toggle OC1A on Compare
Match, OC1B disconnected (normal port operation).
For all other WGM1 settings, normal port operation,
OC1A/OC1B disconnected.
Clear OCnA/OCnB on Compare Match, set
OCnA/OCnB at BOTTOM (non-inverting mode)
Set OCnA/OCnB on Compare Match, clear
OCnA/OCnB at BOTTOM (inverting mode)
Description
Normal port operation, OCnA/OCnB disconnected.
WGMn3:0 = 9 or 11: Toggle OCnA on Compare
Match, OCnB disconnected (normal port operation).
For all other WGM1 settings, normal port operation,
OC1A/OC1B disconnected.
Clear OCnA/OCnB on Compare Match when up-
counting. Set OCnA/OCnB on Compare Match when
downcounting.
Set OCnA/OCnB on Compare Match when up-
counting. Clear OCnA/OCnB on Compare Match
when downcounting.
(1)
135. Modes of operation supported by the
(See Section “15.9” on page
See Section
124.).
See
134