AT90PWM3B-16SUR Atmel, AT90PWM3B-16SUR Datasheet - Page 29
AT90PWM3B-16SUR
Manufacturer Part Number
AT90PWM3B-16SUR
Description
MCU AVR 8K FLASH 16MHA 32SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM3B-16SU.pdf
(361 pages)
Specifications of AT90PWM3B-16SUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
27
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 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 ~ 105°C
Package / Case
32-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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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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