ATMEGA161L-4PC Atmel, ATMEGA161L-4PC Datasheet - Page 18
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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ATmega161(L)
Figure 21. The Parallel Instruction Fetches and Instruction Executions
Figure 22 shows the internal timing concept for the Register File. In a single clock cycle
an ALU operation using two register operands is executed and the result is stored back
to the destination register.
Figure 22. Single Cycle ALU Operation
The internal data SRAM access is performed in two System Clock cycles as described
in Figure 23.
Figure 23. On-chip Data SRAM Access Cycles
2nd Instruction Execute
Register Operands Fetch
3rd Instruction Execute
1st Instruction Execute
ALU Operation Execute
2nd Instruction Fetch
System Clock Ø
3rd Instruction Fetch
4th Instruction Fetch
1st Instruction Fetch
Total Execution Time
Result Write Back
System Clock Ø
System Clock Ø
Address
Data
Data
WR
RD
Prev. Address
T1
T1
T1
Address
T2
T2
T2
T3
T3
T3
T4
1228D–AVR–02/07
T4
T4
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