ATMEGA8535L-8MI Atmel, ATMEGA8535L-8MI Datasheet - Page 19
ATMEGA8535L-8MI
Manufacturer Part Number
ATMEGA8535L-8MI
Description
IC AVR MCU 8K LV 8MHZ IND 44-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8535L-8MI
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-VQFN Exposed Pad
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SPI, TWI, UART
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
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA8535L-8MI
Manufacturer:
SanRex
Quantity:
1 000
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The EEPROM Address
Register – EEARH and EEARL
The EEPROM Data Register –
EEDR
The EEPROM Control Register
– EECR
2502K–AVR–10/06
• Bits 15..9 – Res: Reserved Bits
These bits are reserved bits in the ATmega8535 and will always read as zero.
• Bits 8..0 – EEAR8..0: EEPROM Address
The EEPROM Address Registers – EEARH and EEARL specify the EEPROM address
in the 512 bytes EEPROM space. The EEPROM data bytes are addressed linearly
between 0 and 511. The initial value of EEAR is undefined. A proper value must be writ-
ten before the EEPROM may be accessed.
• Bits 7..0 – EEDR7..0: EEPROM Data
For the EEPROM write operation, the EEDR Register contains the data to be written to
the EEPROM in the address given by the EEAR Register. For the EEPROM read oper-
ation, the EEDR contains the data read out from the EEPROM at the address given by
EEAR.
• Bits 7..4 – Res: Reserved Bits
These bits are reserved bits in the ATmega8535 and will always read as zero.
• Bit 3 – EERIE: EEPROM Ready Interrupt Enable
Writing EERIE to one enables the EEPROM Ready Interrupt if the I-bit in SREG is set.
Writing EERIE to zero disables the interrupt. The EEPROM Ready interrupt generates a
constant interrupt when EEWE is cleared.
• Bit 2 – EEMWE: EEPROM Master Write Enable
The EEMWE bit determines whether setting EEWE to one causes the EEPROM to be
written. When EEMWE is set, setting EEWE within four clock cycles will write data to the
EEPROM at the selected address If EEMWE is zero, setting EEWE will have no effect.
When EEMWE has been written to one by software, hardware clears the bit to zero after
four clock cycles. See the description of the EEWE bit for an EEPROM write procedure.
• Bit 1 – EEWE: EEPROM Write Enable
The EEPROM Write Enable Signal EEWE is the write strobe to the EEPROM. When
address and data are correctly set up, the EEWE bit must be written to one to write the
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
EEAR7
MSB
R/W
R/W
15
R
X
R
–
7
0
7
0
7
–
0
EEAR6
R/W
R/W
14
R
X
R
–
6
0
6
0
6
–
0
EEAR5
R/W
R/W
13
R
X
R
–
5
0
5
0
5
–
0
EEAR4
R/W
R/W
12
R
R
–
4
0
X
4
0
4
–
0
EEAR3
EERIE
R/W
R/W
R/W
11
–
3
R
0
X
3
0
3
0
EEMWE
EEAR2
R/W
R/W
R/W
10
R
X
–
2
0
2
0
ATmega8535(L)
2
0
EEAR1
EEWE
R/W
R/W
R/W
R
X
9
–
1
0
1
0
X
1
EEAR8
EEAR0
EERE
R/W
R/W
LSB
R/W
R/W
X
X
8
0
0
0
0
0
EEARH
EEARL
EEDR
EECR
19
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