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參數(shù)資料
| 型號(hào)： | R83C154DTXXX-30R |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 30 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁數(shù)： | 12/108頁 |
| 文件大?。?/td> | 3682K |
| 代理商： | R83C154DTXXX-30R |
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11
8069R–AVR–06/2013
XMEGA A4
Not recommended for new designs -
Use XMEGA A4U series
7.3
In-System Programmable Flash Program Memory
The XMEGA A4 devices contain On-chip In-System Programmable Flash memory for program
storage, see Figure 7-1 on page 11. Since all AVR instructions are 16- or 32-bits wide, each
Flash address location is 16 bits.
The Program Flash memory space is divided into Application and Boot sections. Both sections
have dedicated Lock Bits for setting restrictions on write or read/write operations. The Store Pro-
gram Memory (SPM) instruction must reside in the Boot Section when used to write to the Flash
memory.
A third section inside the Application section is referred to as the Application Table section which
has separate Lock bits for storage of write or read/write protection. The Application Table sec-
tion can be used for storing non-volatile data or application software.
The Application Table Section and Boot Section can also be used for general application
software.
Figure 7-1.
Flash Program Memory (Hexadecimal address)
Word Address
0
Application Section
(128 KB/64 KB/32 KB/16 KB)
...
EFFF
/
77FF
/
37FF
/
17FF
F000
/
7800
/
3800
/
1800
Application Table Section
(4 KB/4 KB/4 KB/4 KB)
FFFF
/
7FFF
/
3FFF
/
1FFF
10000
/
8000
/
4000
/
2000
Boot Section
(8 KB/4 KB/4 KB/4 KB)
10FFF
/
87FF
/
47FF
/
27FF
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