ATMEGA16M1-MU Atmel, ATMEGA16M1-MU Datasheet - Page 27
ATMEGA16M1-MU
Manufacturer Part Number
ATMEGA16M1-MU
Description
IC MCU AVR 16K FLASH 32VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA16M1-MU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
CAN, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
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 11x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of I /o
-
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8. System Clock and their Distribution
8.1
8.1.1
8.1.2
8.1.3
8209D–AVR–11/10
Clock Systems and their Distribution
CPU Clock – clk
I/O Clock – clk
Flash Clock – clk
I/O
Figure 8-1
need not be active at a given time. In order to reduce power consumption, the clocks to unused
modules can be halted by using different sleep modes, as described in
Sleep Modes” on page
Figure 8-1.
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, UART. The
I/O clock is also used by the External Interrupt module, but note that some external interrupts
are detected by asynchronous logic, allowing such interrupts to be detected even if the I/O clock
is halted.
The Flash clock controls operation of the Flash interface. The Flash clock is usually active simul-
taneously with the CPU clock.
CPU
FLASH
presents the principal clock systems in the AVR and their distribution. All of the clocks
Fast
Peripherals
Clock Distribution
PLL
CLK
PLL
37. The clock systems are detailed below.
General I/O
Modules
clk
I/O
External Clock
Multiplexer
ADC
Control Unit
AVR Clock
clk
Clock
ADC
Source Clock
ATmega16M1/32M1/64M1
Oscillator)
(Crystal
CPU Core
clk
clk
CPU
Reset Logic
FLASH
Watchdog Clock
RAM
Watchdog
Oscillator
Watchdog Timer
“Power Management and
Flash and
EEPROM
Calibrated RC
Oscillator
27
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