AT90PWM216 Atmel Corporation, AT90PWM216 Datasheet - Page 28
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AT90PWM216
Manufacturer Part Number
AT90PWM216
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM216
Flash (kbytes)
16 Kbytes
Pin Count
24
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
19
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 105
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
12
Input Capture Channels
1
Pwm Channels
7
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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7. System Clock
7.1
7.1.1
7.1.2
7710F–AVR–09/11
Clock Systems and their Distribution
CPU Clock – clk
I/O Clock – clk
I/O
Figure 7-1
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 7-1.
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, USART. 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.
CPU
presents the principal clock systems in the AVR and their distribution. All of the clocks
PSC0/1/2
PLL Input
Multiplexer
PLL
Clock Distribution AT90PWM216/316
CLK
PLL
39. The clock systems are detailed below.
General I/O
Modules
clk
I/O
External Clock
Clock
Multiplexer
ADC
Control Unit
AVR Clock
clk
ADC
Source Clock
Oscillator)
(Crystal
CPU Core
clk
clk
CPU
FLASH
Reset Logic
AT90PWM216/316
Watchdog Clock
RAM
“Power Management and
Oscillator
Watchdog
Watchdog Timer
Flash and
EEPROM
Calibrated RC
Oscillator
28
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