ATMEGA8535L-8PJ Atmel, ATMEGA8535L-8PJ Datasheet - Page 247
![IC MCU AVR 8K 5V 8MHZ 40-DIP](/photos/6/70/67049/453-40-dip_sml.jpg)
ATMEGA8535L-8PJ
Manufacturer Part Number
ATMEGA8535L-8PJ
Description
IC MCU AVR 8K 5V 8MHZ 40-DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8535L-8PJ
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)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Programming the Lock Bits
Reading the Fuse and Lock
Bits
Reading the Signature Bytes
Reading the Calibration Byte
2502K–AVR–10/06
The algorithm for programming the Lock bits is as follows (refer to “Programming the
Flash” on page 243 for details on Command and Data loading):
1. A: Load Command “0010 0000”.
2. C: Load Data Low Byte. Bit n = “0” programs the Lock bit.
3. Give WR a negative pulse and wait for RDY/BSY to go high.
The Lock bits can only be cleared by executing Chip Erase.
The algorithm for reading the Fuse and Lock bits is as follows (refer to “Programming
the Flash” on page 243 for details on Command loading):
1. A: Load Command “0000 0100”.
2. Set OE to “0”, BS2 to “0”, and BS1 to “0”. The status of the Fuse Low bits can
3. Set OE to “0”, BS2 to “1”, and BS1 to “1”. The status of the Fuse High bits can
4. Set OE to “0”, BS2 to “0”, and BS1 to “1”. The status of the Lock bits can now be
5. Set OE to “1”.
Figure 120. Mapping Between BS1, BS2 and the Fuse- and Lock Bits During Read
The algorithm for reading the Signature bytes is as follows (refer to “Programming the
Flash” on page 243 for details on Command and Address loading):
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte (0x00 - 0x02).
3. Set OE to “0”, and BS to “0”. The selected Signature byte can now be read at
4. Set OE to “1”.
The algorithm for reading the Calibration byte is as follows (refer to “Programming the
Flash” on page 243 for details on Command and Address loading):
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte, 0x00.
3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.
4. Set OE to “1”.
now be read at DATA (“0” means programmed).
now be read at DATA (“0” means programmed).
read at DATA (“0” means programmed).
DATA.
Fuse Low Byte
Lock Bits
Fuse High Byte
BS2
0
1
BS1
ATmega8535(L)
0
1
DATA
247
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