ATA5773-DK1 Atmel, ATA5773-DK1 Datasheet - Page 22

• Manufacturer Part Number: ATA5773-DK1
• Description: BOARD XMITTER FOR ATA5773 315MHZ
• Manufacturer: Atmel
• Type: Transmitterr

Specifications of ATA5773-DK1

• Frequency: 315MHz
• Maximum Frequency: 315 MHz
• Supply Voltage (max): 4 V
• Supply Voltage (min): 2 V
• Supply Current: 9 mA
• Product: RF Development Tools
• For Use With/related Products: ATA5773
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.8
4.8.1
4.8.2
22
Memories
Atmel ATA5771/73/74
In-System Re-programmable Flash Program Memory
SRAM Data Memory
This section describes the different memories in the Atmel
architecture has two main memory spaces, the Data memory and the Program memory
space. In addition, the ATtiny44V features an EEPROM Memory for data storage. All three
memory spaces are linear and regular.
The ATtiny44V contains 4K byte On-chip In-System Reprogrammable Flash memory for pro-
gram storage. Since all AVR instructions are 16 or 32 bits wide, the Flash is organized as
2048 x 16.
The Flash memory has an endurance of at least 10,000 write/erase cycles. The ATtiny44V
Program Counter (PC) is 11 bits wide, thus addressing the 2048 Program memory locations.
Section 4.23 “Memory Programming” on page 166
data serial downloading using the SPI pins.
Constant tables can be allocated within the entire Program memory address space (see the
LPM – Load Program Memory Instruction description).
Timing diagrams for instruction fetch and execution are presented in
Figure 4-7.
Figure 4-8 on page 23
The lower 160 Data memory locations address both the Register File, the I/O memory and the
internal data SRAM. The first 32 locations address the Register File, the next 64 locations the
standard I/O memory, and the last 256 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.
Program Memory Map
shows how the ATtiny44V SRAM Memory is organized.
Program Memory
contains a detailed description on Flash
0x07FF
0x0000
®
ATtiny44V. The Atmel AVR
Figure
4-7.
9137E–RKE–12/10
®