ATMEGA8535-16JU Atmel, ATMEGA8535-16JU Datasheet - Page 124
![MCU AVR 8K ISP FLASH MEM 44-PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
ATMEGA8535-16JU
Manufacturer Part Number
ATMEGA8535-16JU
Description
MCU AVR 8K ISP FLASH MEM 44-PLCC
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8535-16JU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Processor Series
ATMEGA8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SPI, TWI, UART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Cpu Family
ATmega
Device Core
AVR
Device Core Size
8b
Frequency (max)
16MHz
Total Internal Ram Size
512Byte
# I/os (max)
32
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Package Type
PLCC
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA8535-16JU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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124
ATmega8535(L)
Figure 58. Fast PWM Mode, Timing Diagram
The Timer/Counter Overflow Flag (TOV2) is set each time the counter reaches MAX. If
the interrupt is enabled, the interrupt handler routine can be used for updating the com-
pare value.
In fast PWM mode, the compare unit allows generation of PWM waveforms on the OC2
pin. Setting the COM21:0 bits to two will produce a non-inverted PWM and an inverted
PWM output can be generated by setting the COM21:0 to three (See Table 53 on page
129). The actual OC2 value will only be visible on the port pin if the data direction for the
port pin is set as output. The PWM waveform is generated by setting (or clearing) the
OC2 Register at the Compare Match between OCR2 and TCNT2, and clearing (or set-
ting) the OC2 Register at the timer clock cycle the counter is cleared (changes from
MAX to BOTTOM).
The PWM frequency for the output can be calculated by the following equation:
The “N” variable represents the prescale factor (1, 8, 32, 64, 128, 256, or 1024).
The extreme values for the OCR2 Register represent special cases when generating a
PWM waveform output in the fast PWM mode. If the OCR2 is set equal to BOTTOM, the
output will be a narrow spike for each MAX+1 timer clock cycle. Setting the OCR2 equal
to MAX will result in a constantly high or low output (depending on the polarity of the out-
put set by the COM21:0 bits.)
A frequency (with 50% duty cycle) waveform output in fast PWM mode can be achieved
by setting OC2 to toggle its logical level on each Compare Match (COM21:0 = 1). The
waveform generated will have a maximum frequency of f
to zero. This feature is similar to the OC2 toggle in CTC mode, except the double buffer
feature of the output compare unit is enabled in the fast PWM mode.
TCNTn
OCn
OCn
Period
1
2
3
f
OCnPWM
4
=
----------------- -
N 256
f
clk_I/O
⋅
5
oc2
6
= f
clk_I/O
OCRn Interrupt Flag Set
OCRn Update and
TOVn Interrupt Flag Set
7
/2 when OCR2 is set
(COMn1:0 = 2)
(COMn1:0 = 3)
2502K–AVR–10/06
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