ATMEGA8535L-8JI Atmel, ATMEGA8535L-8JI Datasheet - Page 45
![IC AVR MCU 8K LV 8MHZ IND 44PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
ATMEGA8535L-8JI
Manufacturer Part Number
ATMEGA8535L-8JI
Description
IC AVR MCU 8K LV 8MHZ IND 44PLCC
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8535L-8JI
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
44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA8535L-8JI
Manufacturer:
TI
Quantity:
5 000
Part Number:
ATMEGA8535L-8JI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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Timed Sequences for
Changing the
Configuration of the
Watchdog Timer
Safety Level 0
Safety Level 1
Safety Level 2
2502K–AVR–10/06
The sequence for changing the Watchdog Timer configuration differs slightly between
the three safety levels. Separate procedures are described for each level.
This mode is compatible with the Watchdog operation found in AT90S8535. The Watch-
dog Timer is initially disabled, but can be enabled by writing the WDE bit to 1 without
any restriction. The Time-out period can be changed at any time without restriction. To
disable an enabled Watchdog Timer and/or changing the Watchdog Time-out, the fol-
lowing procedure must be followed:
1. In the same operation, write a logic one to WDCE and WDE. A logic one must be
2. Within the next four clock cycles, in the same operation, write the WDE and WDP
In this mode, the Watchdog Timer is initially disabled, but can be enabled by writing the
WDE bit to 1 without any restriction. A timed sequence is needed when changing the
Watchdog Time-out period or disabling an enabled Watchdog Timer. To disable an
enabled Watchdog Timer and/or changing the Watchdog Time-out, the following proce-
dure must be followed:
1. In the same operation, write a logic one to WDCE and WDE. A logic one must be
2. Within the next four clock cycles, in the same operation, write the WDE and WDP
In this mode, the Watchdog Timer is always enabled, and the WDE bit will always read
as one. A timed sequence is needed when changing the Watchdog Time-out period. To
change the Watchdog Time-out, the following procedure must be followed:
1. In the same operation, write a logical one to WDCE and WDE. Even though the
2. Within the next four clock cycles, in the same operation, write the WDP bits as
written to WDE regardless of the previous value of the WDE bit.
bits as desired, but with the WDCE bit cleared.
written to WDE regardless of the previous value of the WDE bit.
bits as desired, but with the WDCE bit cleared.
WDE always is set, the WDE must be written to one to start the timed sequence.
desired, but with the WDCE bit cleared. The value written to the WDE bit is
irrelevant.
ATmega8535(L)
45
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