ATMEGA16L-8PC Atmel, ATMEGA16L-8PC Datasheet - Page 24
![IC AVR MCU 16K LV 8MHZ COM 40DIP](/photos/6/70/67049/453-40-dip_sml.jpg)
ATMEGA16L-8PC
Manufacturer Part Number
ATMEGA16L-8PC
Description
IC AVR MCU 16K LV 8MHZ COM 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA16L-8PC
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
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
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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System Clock
and Clock
Options
Clock Systems
and their
Distribution
CPU Clock – clk
I/O Clock – clk
Flash Clock – clk
Asynchronous Timer
Clock – clk
2466T–AVR–07/10
ASY
I/O
CPU
FLASH
Figure 11
need not be active at a given time. In order to reduce power consumption, the clocks to modules
not being used can be halted by using different sleep modes, as described in
ment and Sleep Modes” on page
Figure 11. Clock Distribution
The CPU clock is routed to parts of the system concerned with operation of the AVR core.
Examples of such modules are the General Purpose Register File, the Status Register and the
data memory holding the Stack Pointer. Halting the CPU clock inhibits the core from performing
general operations and calculations.
The I/O clock is used by the majority of the I/O modules, like Timer/Counters, SPI, and USART.
The I/O clock is also used by the External Interrupt module, but note that some external inter-
rupts are detected by asynchronous logic, allowing such interrupts to be detected even if the I/O
clock is halted. Also note that address recognition in the TWI module is carried out asynchro-
nously when clk
The Flash clock controls operation of the Flash interface. The Flash clock is usually active simul-
taneously with the CPU clock.
The Asynchronous Timer clock allows the Asynchronous Timer/Counter to be clocked directly
from an external 32 kHz clock crystal. The dedicated clock domain allows using this
Timer/Counter as a real-time counter even when the device is in sleep mode.
Timer/Counter
Timer/Counter
Asynchronous
Oscillator
presents the principal clock systems in the AVR and their distribution. All of the clocks
I/O
is halted, enabling TWI address reception in all sleep modes.
General I/O
Modules
External RC
Oscillator
clk
clk
ASY
I/O
32. The clock systems are detailed
External Clock
ADC
Control Unit
AVR Clock
Multiplexer
clk
Clock
ADC
Source Clock
CPU Core
clk
Oscillator
clk
Crystal
CPU
Reset Logic
FLASH
Watchdog Clock
Crystal Oscillator
RAM
Low-frequency
Watchdog Timer
Figure
ATmega16(L)
Watchdog
Oscillator
11.
Flash and
EEPROM
“Power Manage-
Calibrated RC
Oscillator
24
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