ATMEGA64A-ANR Atmel, ATMEGA64A-ANR Datasheet - Page 18

• Manufacturer Part Number: ATMEGA64A-ANR
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64A-ANR

• 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: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.2
8160C–AVR–07/09
SRAM Data Memory
Figure 7-1.
The ATmega64A supports two different configurations for the SRAM data memory as listed in
Table
Table 7-1.
Figure 7-2
The ATmega64A is a complex microcontroller with more peripheral units than can be supported
within the 64 locations reserved in the Opcode for the IN and OUT instructions. For the
Extended I/O space from 0x60 - 0xFF in SRAM, only the ST/STS/STD and LD/LDS/LDD instruc-
tions can be used. The Extended I/O space does not exist when the ATmega64A is in the
ATmega103 compatibility mode.
The first 4,352 data memory locations address both the Register File, the I/O memory, Extended
I/O memory, and the internal data SRAM. The first 32 locations address the Register File, the
next 64 location the standard I/O memory, then 160 locations of Extended I/O memory, and the
next 4,096 locations address the internal data SRAM.
Configuration
Normal mode
ATmega103 compatibility mode
7-1.
on
page 20
Program Memory Map
Memory Configurations
shows how the ATmega64A SRAM Memory is organized.
Application Flash Section
Boot Flash Section
Internal SRAM
Data Memory
4096
4000
$0000
$7FFF
External SRAM
Data Memory
up to 64K
up to 64K
ATmega64A
18