A000046 Arduino, A000046 Datasheet - Page 16

• Manufacturer Part Number: A000046
• Description: MCU, MPU & DSP Development Tools Uno
• Manufacturer: Arduino
• Series: -r
• Type: MCUr

Specifications of A000046

• Processor To Be Evaluated: ATmega328
• Interface Type: USB, I2C, SPI
• Dimensions: 2.7 in x 2.1 in
• Operating Supply Voltage: 5 V
• Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ATmega328

7. AVR Memories
7.1
7.2
8161D–AVR–10/09
Overview
In-System Reprogrammable Flash Program Memory
This section describes the different memories in the ATmega48PA/88PA/168PA/328P. The AVR
architecture has two main memory spaces, the Data Memory and the Program Memory space.
In addition, the ATmega48PA/88PA/168PA/328P features an EEPROM Memory for data stor-
age. All three memory spaces are linear and regular.
The ATmega48PA/88PA/168PA/328P contains 4/8/16/32K bytes On-chip In-System Repro-
grammable Flash memory for program storage. Since all AVR instructions are 16 or 32 bits
wide, the Flash is organized as 2/4/8/16K x 16. For software security, the Flash Program mem-
ory space is divided into two sections, Boot Loader Section and Application Program Section in
ATmega88PA and ATmega168PA. See SELFPRGEN description in section
Program Memory Control and Status Register” on page 292
The Flash memory has an endurance of at least 10,000 write/erase cycles. The
ATmega48PA/88PA/168PA/328P Program Counter (PC) is 11/12/13/14 bits wide, thus address-
ing the 2/4/8/16K program memory locations. The operation of Boot Program section and
associated Boot Lock bits for software protection are described in detail in
the Flash, ATmega48PA” on page 269
gramming, ATmega88PA, ATmega168PA and ATmega328P” on page
Programming” on page 294
Parallel Programming mode.
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
ing” on page
13.
contains a detailed description on Flash Programming in SPI- or
ATmega48PA/88PA/168PA/328P
and
”Boot Loader Support – Read-While-Write Self-Pro-
for more details.
”Instruction Execution Tim-
”Self-Programming
”SPMCSR – Store
277.
”Memory
16