參數(shù)資料
型號: SC28L92A1A,518
廠商: NXP Semiconductors
文件頁數(shù): 10/73頁
文件大?。?/td> 0K
描述: IC UART DUAL W/FIFO 44-PLCC
標準包裝: 500
系列: IMPACT
特點: 故障啟動位檢測
通道數(shù): 2,DUART
FIFO's: 16 字節(jié)
電源電壓: 3.3V,5V
帶自動流量控制功能:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 44-LCC(J 形引線)
供應商設備封裝: 44-PLCC
包裝: 帶卷 (TR)
其它名稱: 935263293518
SC28L92A1A-T
SC28L92A1A-T-ND
18
2552K–AVR–04/11
ATmega329/3290/649/6490
7.
AVR ATmega329/3290/649/6490 Memories
This section describes the different memories in the ATmega329/3290/649/6490. The Atmel
AVR architecture has two main memory spaces, the Data Memory and the Program Memory
space. In addition, the ATmega329/3290/649/6490 features an EEPROM Memory for data stor-
age. All three memory spaces are linear.
7.1
In-System Reprogrammable Flash Program Memory
The ATmega329/3290/649/6490 contains 32/64Kbytes 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 16/32K x 16. For software security, the Flash Program memory space is divided
into two sections, Boot Program section and Application Program section.
The F lash memory has an endurance of at least 10,000 write/erase cycles. The
ATmega329/3290/649/6490 Program Counter (PC) is 14/15 bits wide, thus addressing the
16/32K program memory locations. The operation of Boot Program section and associated Boot
Lock bits for software protection are described in detail in “Boot Loader Support – Read-While-
description on Flash data serial downloading using the SPI pins or the JTAG interface.
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 “Instruction Execution Tim-
Figure 7-1.
Program Memory Map
0x0000
0x3FFF/0x7FFF
Program Memory
Application Flash Section
Boot Flash Section
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