ATMEGA8535L-8AC Atmel, ATMEGA8535L-8AC Datasheet - Page 117

• Manufacturer Part Number: ATMEGA8535L-8AC
• Description: IC AVR MCU 8K LV 8MHZ COM 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8535L-8AC

• 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: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

8-bit Timer/Counter2
with PWM and
Asynchronous
Operation
Overview
2502K–AVR–10/06
Timer/Counter2 is a general purpose, single channel, 8-bit Timer/Counter module. The
main features are:
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A simplified block diagram of the 8-bit Timer/Counter is shown in Figure 53. For the
actual placement of I/O pins, refer to “Pinout ATmega8535” on page 2. CPU accessible
I/O Registers, including I/O bits and I/O pins, are shown in bold. The device-specific I/O
Register and bit locations are listed in the “8-bit Timer/Counter Register Description” on
page 128.
Figure 53. 8-bit Timer/Counter Block Diagram
Single Channel Counter
Clear Timer on Compare Match (Auto Reload)
Glitch-free, Phase Correct Pulse Width Modulator (PWM)
Frequency Generator
10-bit Clock Prescaler
Overflow and Compare Match Interrupt Sources (TOV2 and OCF2)
Allows Clocking from External 32 kHz Watch Crystal Independent of the I/O Clock
Status Flags
Timer/Counter
TCNTn
OCRn
=
ASSRn
direction
count
BOTTOM
clear
Synchronized Status Flags
= 0
Control Logic
=
TCCRn
TOP
Asynchronous Mode
0xFF
Select (ASn)
clk
Tn
Synchronization Unit
OCn
(Int.Req.)
Generation
Waveform
Prescaler
ATmega8535(L)
Oscillator
T/C
clk
TOVn
(Int.Req.)
clk
clk
OCn
ASY
I/O
I/O
TOSC2
TOSC1
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