ATMEGA8535L-8PU Atmel, ATMEGA8535L-8PU Datasheet - Page 83
![IC AVR MCU 8K 8MHZ 3V 40DIP](/photos/6/70/67049/453-40-dip_sml.jpg)
ATMEGA8535L-8PU
Manufacturer Part Number
ATMEGA8535L-8PU
Description
IC AVR MCU 8K 8MHZ 3V 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8535L-8PU
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
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)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Processor Series
ATMEGA8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
2-Wire, SPI, USART
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
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
Company:
Part Number:
ATMEGA8535L-8PU
Manufacturer:
TI
Quantity:
12 000
- Current page: 83 of 321
- Download datasheet (3Mb)
8-bit Timer/Counter
Register Description
Timer/Counter Control
Register – TCCR0
2502K–AVR–10/06
• Bit 7 – FOC0: Force Output Compare
The FOC0 bit is only active when the WGM00 bit specifies a non-PWM mode. However,
for ensuring compatibility with future devices, this bit must be set to zero when TCCR0 is
written when operating in PWM mode. When writing a logical one to the FOC0 bit, an
immediate Compare Match is forced on the Waveform Generation unit. The OC0 output
is changed according to its COM01:0 bits setting. Note that the FOC0 bit is implemented
as a strobe. Therefore it is the value present in the COM01:0 bits that determines the
effect of the forced compare.
A FOC0 strobe will not generate any interrupt, nor will it clear the timer in CTC mode
using OCR0 as TOP.
The FOC0 bit is always read as zero.
• Bit 6, 3 – WGM01:0: Waveform Generation Mode
These bits control the counting sequence of the counter, the source for the maximum
(TOP) counter value, and what type of waveform generation to be used. Modes of oper-
ation supported by the Timer/Counter unit are: Normal mode, Clear Timer on Compare
Match (CTC) mode, and two types of Pulse Width Modulation (PWM) modes. See Table
39 and “Modes of Operation” on page 76.
Table 39. Waveform Generation Mode Bit Description
Note:
• Bit 5:4 – COM01:0: Compare Match Output Mode
These bits control the Output Compare pin (OC0) behavior. If one or both of the
COM01:0 bits are set, the OC0 output overrides the normal port functionality of the I/O
pin it is connected to. However, note that the Data Direction Register (DDR) bit corre-
sponding to the OC0 pin must be set in order to enable the output driver.
Bit
Read/Write
Initial Value
Mode
0
1
2
3
1. The CTC0 and PWM0 bit definition names are now obsolete. Use the WGM01:0 def-
WGM01
(CTC0)
initions. However, the functionality and location of these bits are compatible with
previous versions of the Timer.
0
0
1
1
FOC0
W
7
0
WGM00
(PWM0)
WGM00
R/W
0
1
0
1
6
0
COM01
Mode of Operation
Normal
PWM, Phase Correct
CTC
Fast PWM
R/W
5
0
COM00
R/W
4
0
WGM01
R/W
3
0
(1)
TOP
0xFF
0xFF
OCR0
0xFF
CS02
R/W
ATmega8535(L)
2
0
Update of
OCR0
TOP
Immediate
BOTTOM
Immediate
CS01
R/W
1
0
CS00
R/W
0
0
TOV0 Flag
Set on
MAX
BOTTOM
MAX
MAX
TCCR0
83
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