ATMEGA16-16AC Atmel, ATMEGA16-16AC Datasheet - Page 83
![IC AVR MCU 16K 16MHZ COM 44-TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA16-16AC
Manufacturer Part Number
ATMEGA16-16AC
Description
IC AVR MCU 16K 16MHZ COM 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA16-16AC
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
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
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8-bit
Timer/Counter
Register
Description
Timer/Counter Control
Register – TCCR0
2466T–AVR–07/10
• Bit 7 – FOC0: Force Output Compare
The FOC0 bit is only active when the WGM00 bit specifies a non-PWM mode. However, for
ensuring compatibility with future devices, this bit must be set to zero when TCCR0 is written
when operating in PWM mode. When writing a logical one to the FOC0 bit, an immediate com-
pare match is forced on the Waveform Generation unit. The OC0 output is changed according to
its COM01:0 bits setting. Note that the FOC0 bit is implemented as a strobe. Therefore it is the
value present in the COM01:0 bits that determines the effect of the forced compare.
A FOC0 strobe will not generate any interrupt, nor will it clear the timer in CTC mode using
OCR0 as TOP.
The FOC0 bit is always read as zero.
• Bit 3, 6 – WGM01:0: 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 sup-
ported 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
Operation” on page
Table 38. Waveform Generation Mode Bit Description
Note:
• Bit 5:4 – COM01:0: 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.
Bit
Read/Write
Initial Value
Mode
0
1
2
3
1. The CTC0 and PWM0 bit definition names are now obsolete. Use the WGM01:0 definitions.
WGM01
(CTC0)
However, the functionality and location of these bits are compatible with previous versions of
the timer.
0
0
1
1
FOC0
W
7
0
76.
WGM00
(PWM0)
WGM00
R/W
0
1
0
1
6
0
COM01
Timer/Counter Mode
of Operation
Normal
PWM, Phase Correct
CTC
Fast PWM
R/W
5
0
COM00
R/W
4
0
WGM01
R/W
3
0
TOP
0xFF
0xFF
OCR0
0xFF
(1)
CS02
R/W
2
0
Update of
OCR0
TOP
Immediate
Immediate
BOTTOM
CS01
R/W
1
0
ATmega16(L)
Table 38
CS00
R/W
0
0
TOV0 Flag
Set-on
MAX
BOTTOM
MAX
MAX
TCCR0
and
“Modes of
83
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