ATMEGA161L-4PC Atmel, ATMEGA161L-4PC Datasheet - Page 7
ATMEGA161L-4PC
Manufacturer Part Number
ATMEGA161L-4PC
Description
IC AVR MCU 16K LV 4MHZ COM 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA161-8AC.pdf
(159 pages)
Specifications of ATMEGA161L-4PC
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI, UART/USART
Peripherals
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)
2.7 V ~ 5.5 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
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Architectural
Overview
1228D–AVR–02/07
The fast-access Register File concept contains 32 x 8-bit general purpose working reg-
isters with a single clock cycle access time. This means that during one single clock
cycle, one Arithmetic Logic Unit (ALU) operation is executed. Two operands are output
from the Register File, the operation is executed and the result is stored back in the
Register File – in one clock cycle.
Six of the 32 registers can be used as three 16-bit indirect address register pointers for
Data Space addressing – enabling efficient address calculations. One of the three
address pointers is also used as the address pointer for the constant table look-up func-
tion. These added function registers are the 16-bit X-register, Y-register and Z-register.
The ALU supports arithmetic and logic functions between registers or between a con-
stant and a register. Single register operations are also executed in the ALU. Figure 4
shows the ATmega161 AVR RISC microcontroller architecture.
Figure 4. The ATmega161 AVR RISC Architecture
Control Lines
Instruction
Instruction
Program
Register
Decoder
8K x 16
Memory
Program
Counter
and Control
Registers
EEPROM
I/O Lines
1024 x 8
Purpose
General
512 x 8
Data Bus 8-bit
SRAM
Status
32 x 8
Data
ALU
32
ATmega161(L)
Timer/Counter
Timer/Counter
Timer/Counter
Comparator
with PWM
with PWM
with PWM
Watchdog
and RTC
Interrupt
Analog
UART0
Serial
Timer
16-bit
UART1
Serial
8-bit
8-bit
Unit
Unit
SPI
7
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