AT90PWM3B Atmel Corporation, AT90PWM3B Datasheet - Page 29
AT90PWM3B
Manufacturer Part Number
AT90PWM3B
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM3B
Flash (kbytes)
8 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
3
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.5
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
5
Output Compare Channels
16
Input Capture Channels
1
Pwm Channels
12
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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7.1.1
7.1.2
7.1.3
7.1.4
4317J–AVR–08/10
CPU Clock – clk
I/O Clock – clk
Flash Clock – clk
PLL Clock – clk
I/O
Figure 7-2.
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.
The Flash clock controls operation of the Flash interface. The Flash clock is usually active simul-
taneously with the CPU clock.
The PLL clock allows the PSC modules to be clocked directly from a 64/32 MHz clock. A 16 MHz
clock is also derived for the CPU.
PLL
CPU
FLASH
PSC0/1/2
PLL Input
Multiplexer
PLL
Clock Distribution AT90PWM2B/3B
CLK
PLL
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
AT90PWM2/3/2B/3B
CPU
FLASH
Reset Logic
Watchdog Clock
RAM
Oscillator
Watchdog
Watchdog Timer
Flash and
EEPROM
Calibrated RC
Oscillator
29
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