ATMEGA168PA-PU Atmel, ATMEGA168PA-PU Datasheet - Page 16

• Manufacturer Part Number: ATMEGA168PA-PU
• Description: MCU, 8BIT, AVR, 16K FLASH, 28PDIP
• Manufacturer: Atmel

Specifications of ATMEGA168PA-PU

• Controller Family/series: Atmega
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 20MHz
• No.: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 16KB
• Oscillator Type: External, Internal
• Rohs Compliant: Yes

7. AVR Memories
7.1
7.2
8271C–AVR–08/10
Overview
In-System Reprogrammable Flash Program Memory
T h i s
ATmega48A/48PA/88A/88PA/168A/168PA/328/328P. The AVR architecture has two main
memory spaces, the Data Memory and the Program Memory space. In addition, the
ATmega48A/48PA/88A/88PA/168A/168PA/328/328P features an EEPROM Memory for data
storage. All three memory spaces are linear and regular.
The ATmega48A/48PA/88A/88PA/168A/168PA/328/328P contains 4/8/16/32K bytes On-chip
In-System Reprogrammable 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 memory space is divided into two sections, Boot Loader Section and Application Pro-
gram Section in ATmega88PA and ATmega168PA. See SELFPRGEN description in section
”SPMCSR – Store Program Memory Control and Status Register” on page 294
The Flash memory has an endurance of at least 10,000 write/erase cycles. The
ATmega48A/48PA/88A/88PA/168A/168PA/328/328P Program Counter (PC) is 11/12/13/14 bits
wide, thus addressing 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
gramming the Flash, ATmega 48A/48PA” on page 270
Write Self-Programming” on page
description on Flash Programming in SPI- or 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
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
s e c t i o n
13.
d e s c r i b e s
279.
”Memory Programming” on page 296
t h e
d i f f e r e n t
and
”Boot Loader Support – Read-While-
m e m o r i e s
”Instruction Execution Tim-
contains a detailed
for more details.
i n
”Self-Pro-
t h e
16