ATMEGA161L-4PC Atmel, ATMEGA161L-4PC Datasheet - Page 17
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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Relative Program Addressing,
RJMP and RCALL
Direct Program Addressing,
JMP and CALL
Memory Access Times
and Instruction
Execution Timing
1228D–AVR–02/07
Program execution continues at address contained by the Z-register (i.e., the PC is
loaded with the contents of the Z-register).
Figure 19. Relative Program Memory Addressing
Program execution continues at address PC + k + 1. The relative address k is -2048 to
2047.
Figure 20. Direct Program Addressing
Program execution continues at the address immediate in the instruction words.
This section describes the general access timing concepts for instruction execution and
internal memory access.
The AVR CPU is driven by the System Clock Ø, directly generated from the external
clock crystal for the chip. No internal clock division is used.
Figure 21 shows the parallel instruction fetches and instruction executions enabled by
the Harvard architecture and the fast-access Register File concept. This is the basic
pipelining concept to obtain up to 1 MIPS per MHz with the corresponding unique results
for functions per cost, functions per clocks and functions per power unit.
15
15
OP
31
15
12 11
OP
PC
16 LSBs
k
21 20
0
0
16
0
PROGRAM MEMORY
PROGRAM MEMORY
ATmega161(L)
$0000
$1FFF
$000
$1FFF
17
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