ATMEGA162V-1MC Atmel, ATMEGA162V-1MC Datasheet - Page 115
ATMEGA162V-1MC
Manufacturer Part Number
ATMEGA162V-1MC
Description
IC MCU AVR 16K 1.8V 8MHZ 44-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA162V-1MC
Core Processor
AVR
Core Size
8-Bit
Speed
1MHz
Connectivity
EBI/EMI, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
35
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 ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-VQFN Exposed Pad
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
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Compare Match Output
Unit
2513C–AVR–09/02
The Compare Output mode (COMnx1:0) bits have two functions. The waveform genera-
tor uses the COMnx1:0 bits for defining the output compare (OCnx) state at the next
compare match. Secondly the COMnx1:0 bits control the OCnx pin output source. Fig-
ure 50 shows a simplified schematic of the logic affected by the COMnx1:0 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
COMnx1:0 bits are shown. When referring to the OCnx state, the reference is for the
internal OCnx Register, not the OCnx pin. If a System Reset occur, the OCnx Register is
reset to “0”.
Figure 50. Compare Match Output Unit, Schematic
The general I/O port function is overridden by the output compare (OCnx) from the
Waveform Generator if either of the COMnx1:0 bits are set. However, the OCnx 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 OCnx pin (DDR_OCnx) must be set as
output before the OCnx value is visible on the pin. The port override function is generally
independent of the Waveform Generation mode, but there are some exceptions. Refer
to Table 53, Table 54 and Table 55 for details.
The design of the output compare pin logic allows initialization of the OCnx state before
the output is enabled. Note that some COMnx1:0 bit settings are reserved for certain
modes of operation. See “16-bit Timer/Counter Register Description” on page 126.
The COMnx1:0 bits have no effect on the input capture unit.
COMnx1
COMnx0
FOCnx
clk
I/O
Waveform
Generator
D
D
D
PORT
DDR
OCnx
ATmega162(V/U/L)
Q
Q
Q
1
0
OCnx
Pin
115
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