ATMEGA163 ATMEL [ATMEL Corporation], ATMEGA163 Datasheet - Page 134

• Manufacturer Part Number: ATMEGA163
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Memory
Programming
Boot Loader Support
134
ATmega163(L)
The ATmega163 provides a mechanism for Programming and Re-programming code by
the MCU itself. This feature allows flexible application software updates, controlled by
the MCU using a Flash-resident Boot Loader program. This makes it possible to pro-
gram the AVR in a target system without access to its SPI pins. The Boot Loader
program can use any available data interface and associated protocol, such as UART
serial bus interface, to input or output program code, and write (program) that code into
the Flash memory, or read the code from the Flash memory.
The ATmega163 Flash memory is organized in two main sections:
•
•
The Application Flash section and the Boot Loader Flash section have seperate Boot
Lock bits. Thus the user can select different levels of protection for the two sections. The
Store Program Memory (SPM) instruction can only be executed from the Boot Loader
Flash section.
The Program Flash memory in ATmega163 is divided into 128 pages of 64 words each.
The Boot Loader Flash section is located at the high address space of the Flash, and
can be configured through the BOOTSZ Fuses as shown in Table 51.
Table 51. Boot Size Configuration
BOOTSZ1
The Application Flash section
The Boot Loader Flash section
1
1
0
0
BOOTSZ0
1
0
1
0
Boot
Size
128
Words
256
Words
512
Words
1024
Words
Pages
16
2
4
8
Application Flash
Addresses
$0000 - $1F7F
$0000 - $1EFF
$0000 - $1DFF
$0000 - $1BFF
Boot Flash
Addresses
$1F80 - $1FFF
$1F00 - $1FFF
$1E00 - $1FFF
$1C00 - $1FFF
1142E–AVR–02/03