ATMEGA8535-16MUR Atmel, ATMEGA8535-16MUR Datasheet - Page 17
ATMEGA8535-16MUR
Manufacturer Part Number
ATMEGA8535-16MUR
Description
MCU AVR 8K FLASH 16MHZ 44QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA8535L-8AU.pdf
(321 pages)
Specifications of ATMEGA8535-16MUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
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)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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SRAM Data Memory
2502K–AVR–10/06
Figure 9 shows how the ATmega8535 SRAM Memory is organized.
The 608 Data Memory locations address the Register File, the I/O Memory, and the
internal data SRAM. The first 96 locations address the Register File and I/O Memory,
and the next 512 locations address the internal data SRAM.
The five different addressing modes for the data memory cover: Direct, Indirect with Dis-
placement, Indirect, Indirect with Pre-decrement, and Indirect with Post-increment. In
the Register File, registers R26 to R31 feature the indirect addressing pointer registers.
The direct addressing reaches the entire data space.
The Indirect with Displacement mode reaches 63 address locations from the base
address given by the Y- or Z-register.
When using register indirect addressing modes with automatic pre-decrement and post-
increment, the address registers X, Y, and Z are decremented or incremented.
The 32 general purpose working registers, 64 I/O Registers, and the 512 bytes of inter-
nal data SRAM in the ATmega8535 are all accessible through all these addressing
modes. The Register File is described in “General Purpose Register File” on page 11.
Figure 9. Data Memory Map
I/O Registers
Register File
R29
R30
$3D
R31
$00
$01
$02
$3E
$3F
R0
R1
R2
...
...
ATmega8535(L)
Data Address Space
Internal SRAM
$001D
$005D
$001E
$005E
$005F
$025E
$025F
$0000
$0001
$0002
$001F
$0020
$0021
$0022
$0060
$0061
...
...
...
17
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