ATMEGA169V-1MC Atmel, ATMEGA169V-1MC Datasheet - Page 83
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
ATMEGA169V-1MC
Manufacturer Part Number
ATMEGA169V-1MC
Description
IC MCU AVR 16K 1.8V 1MHZ 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169V-1MC
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-MLF®, 64-QFN
For Use With
ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Compare Match Output
Unit
Compare Output Mode and
Waveform Generation
2514H–AVR–05/03
The Compare Output mode (COM0A1:0) bits have two functions. The Waveform Gener-
ator uses the COM0A1:0 bits for defining the Output Compare (OC0A) state at the next
compare match. Also, the COM0A1:0 bits control the OC0A pin output source. Figure 29
shows a simplified schematic of the logic affected by the COM0A1:0 bit setting. The I/O
Registers, I/O bits, and I/O pins in the figure are shown in bold. Only the parts of the
general I/O port control registers (DDR and PORT) that are affected by the COM0A1:0
bits are shown. When referring to the OC0A state, the reference is for the internal OC0A
Register, not the OC0A pin. If a System Reset occur, the OC0A Register is reset to “0”.
Figure 29. Compare Match Output Unit, Schematic
The general I/O port function is overridden by the Output Compare (OC0A) from the
Waveform Generator if either of the COM0A1:0 bits are set. However, the OC0A pin
direction (input or output) is still controlled by the Data Direction Register (DDR) for the
port pin. The Data Direction Register bit for the OC0A pin (DDR_OC0A) must be set as
output before the OC0A value is visible on the pin. The port override function is indepen-
dent of the Waveform Generation mode.
The design of the Output Compare pin logic allows initialization of the OC0A state
before the output is enabled. Note that some COM0A1:0 bit settings are reserved for
certain modes of operation. See “8-bit Timer/Counter Register Description” on page 89.
The Waveform Generator uses the COM0A1:0 bits differently in Normal, CTC, and
PWM modes. For all modes, setting the COM0A1:0 = 0 tells the Waveform Generator
that no action on the OC0A Register is to be performed on the next compare match. For
compare output actions in the non-PWM modes refer to Table 50 on page 90. For fast
PWM mode, refer to Table 51 on page 90, and for phase correct PWM refer to Table 52
on page 91.
A change of the COM0A1:0 bits state will have effect at the first compare match after the
bits are written. For non-PWM modes, the action can be forced to have immediate effect
by using the FOC0A strobe bits.
COMnx1
COMnx0
FOCn
clk
I/O
Waveform
Generator
D
D
D
PORT
DDR
OCnx
Q
Q
Q
1
0
ATmega169V/L
OCn
Pin
83
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