ATMEGA8515-16AI Atmel, ATMEGA8515-16AI Datasheet - Page 120

• Manufacturer Part Number: ATMEGA8515-16AI
• Description: IC AVR MCU 8K 16MHZ IND 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8515-16AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

120
ATmega8515(L)
Table 52. Compare Output Mode, Phase Correct and Phase and Frequency Correct
PWM
Note:
• Bit 3 – FOC1A: Force Output Compare for Channel A
• Bit 2 – FOC1B: Force Output Compare for Channel B
The FOC1A/FOC1B bits are only active when the WGM13:0 bits specifies a non-PWM
mode. However, for ensuring compatibility with future devices, these bits must be set to
zero when TCCR1A is written when operating in a PWM mode. When writing a logical
one to the FOC1A/FOC1B bit, an immediate Compare Match is forced on the waveform
generation unit. The OC1A/OC1B output is changed according to its COM1x1:0 bits set-
ting. Note that the FOC1A/FOC1B bits are implemented as strobes. Therefore it is the
value present in the COM1x1:0 bits that determine the effect of the forced compare.
A FOC1A/FOC1B strobe will not generate any interrupt nor will it clear the timer in Clear
Timer on Compare Match (CTC) mode using OCR1A as TOP.
The FOC1A/FOC1B bits are always read as zero.
• Bit 1:0 – WGM11:0: Waveform Generation Mode
Combined with the WGM13:2 bits found in the TCCR1B Register, these bits control the
counting sequence of the counter, the source for maximum (TOP) counter value, and
what type of waveform generation to be used, see Table 53. Modes of operation sup-
ported by the Timer/Counter unit are: Normal mode (counter), Clear Timer on Compare
Match (CTC) mode, and three types of Pulse Width Modulation (PWM) modes. See
“Modes of Operation” on page 109.
COM1A1/
COM1B1
(1)
0
0
1
1
1. A special case occurs when OCR1A/OCR1B equals TOP and COM1A1/COM1B1 is
set. See “Phase Correct PWM Mode” on page 113. for more details.
COM1A0/
COM1B0
0
1
0
1
Description
Normal port operation, OC1A/OC1B disconnected.
WGM13:0 = 9 or 11: Toggle OC1A on Compare Match, OC1B
disconnected (Normal port operation). For all other WGM1
setting, Normal port operation, OC1A/OC1B disconnected.
Clear OC1A/OC1B on Compare Match when up-counting. Set
OC1A/OC1B on Compare Match when downcounting.
Set OC1A/OC1B on Compare Match when up-counting. Clear
OC1A/OC1B on Compare Match when downcounting.
2512K–AVR–01/10