ATMEGA169V-1AC Atmel, ATMEGA169V-1AC Datasheet - Page 89
ATMEGA169V-1AC
Manufacturer Part Number
ATMEGA169V-1AC
Description
IC MCU AVR 16K 1.8V 1MHZ 64-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169V-1AC
Core Processor
AVR
Core Size
8-Bit
Speed
1MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
53
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
64-TQFP, 64-VQFP
For Use With
ATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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8-bit Timer/Counter
Register Description
Timer/Counter Control
Register A – TCCR0A
2514H–AVR–05/03
Figure 36 shows the setting of OCF0A and the clearing of TCNT0 in CTC mode.
Figure 36. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with
Prescaler (f
• Bit 7 – FOC0A: Force Output Compare A
The FOC0A bit is only active when the WGM00 bit specifies a non-PWM mode. How-
ever, 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
FOC0A bit, an immediate compare match is forced on the Waveform Generation unit.
The OC0A output is changed according to its COM0A1:0 bits setting. Note that the
FOC0A bit is implemented as a strobe. Therefore it is the value present in the
COM0A1:0 bits that determines the effect of the forced compare.
A FOC0A strobe will not generate any interrupt, nor will it clear the timer in CTC mode
using OCR0A as TOP.
The FOC0A bit is always read as zero.
• Bit 6, 3 – 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 oper-
ation 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 Table
49 and “Modes of Operation” on page 84.
Bit
Read/Write
Initial Value
TCNTn
(clk
OCRnx
(CTC)
OCFnx
clk
clk
I/O
I/O
Tn
/8)
clk_I/O
FOC0A
W
7
0
/8)
TOP - 1
WGM00
R/W
6
0
COM0A1
R/W
5
0
COM0A0
R/W
TOP
4
0
WGM01
TOP
R/W
3
0
CS02
R/W
BOTTOM
ATmega169V/L
2
0
CS01
R/W
1
0
CS00
R/W
BOTTOM + 1
0
0
TCCR0
89
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