ATMEGA64RZAV-10PU Atmel, ATMEGA64RZAV-10PU Datasheet - Page 18

• Manufacturer Part Number: ATMEGA64RZAV-10PU
• Description: MCU ATMEGA644/AT86RF230 40-DIP
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA64RZAV-10PU

• Frequency: 2.4GHz
• Modulation Or Protocol: 802.15.4 Zigbee
• Power - Output: 3dBm
• Sensitivity: -101dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Data Interface: PCB, Surface Mount
• Memory Size: 64kB Flash, 2kB EEPROM, 4kB RAM
• Antenna Connector: PCB, Surface Mount
• Package / Case: 40-DIP (0.600", 15.24mm)
• Wireless Frequency: 2.4 GHz
• Interface Type: JTAG, SPI
• Output Power: 3 dBm
• For Use With: ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Applications: -
• Data Rate - Maximum: -
• Current - Transmitting: -
• Current - Receiving: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: ATmega64

6.2
18
SRAM Data Memory
ATmega644
Figure 6-2 on page 18
The ATmega644 is a complex microcontroller with more peripheral units than can be supported
within the 64 location reserved in the Opcode for the IN and OUT instructions. For the Extended
I/O space from $060 - $0FF in SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can
be used.
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.
The five different addressing modes for the data memory cover: Direct, Indirect with Displace-
ment, 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-incre-
ment, the address registers X, Y, and Z are decremented or incremented.
The 32 general purpose working registers, 64 I/O registers, 160 Extended I/O Registers and the
4096 bytes of internal data SRAM in the ATmega644 are all accessible through all these
addressing modes. The Register File is described in
12.
Figure 6-2.
Data Memory Map
shows how the ATmega644 SRAM Memory is organized.
160 Ext I/O Reg.
64 I/O Registers
Data Memory
Internal SRAM
32 Registers
(4096 x 8)
”General Purpose Register File” on page
$0000 - $001F
$10FF
$0020 - $005F
$0060 - $00FF
$0100
2593N–AVR–07/10