參數(shù)資料
型號: DTMFDECODER-RD
廠商: Silicon Laboratories Inc
文件頁數(shù): 174/178頁
文件大?。?/td> 0K
描述: KIT REF DESIGN DTMF DECODER
應用說明: DTMF Decoder Ref Design AppNote
標準包裝: 1
主要目的: 電信,DTMF 解碼器
嵌入式:
已用 IC / 零件: C8051F300
主要屬性: 8kHz 采樣速率模數(shù)轉換器
次要屬性: 16 個 Goertzel 濾波器
已供物品: 板,軟件
產(chǎn)品目錄頁面: 627 (CN2011-ZH PDF)
相關產(chǎn)品: 336-1535-5-ND - IC 8051 MCU 8K FLASH 14-SOIC
C8051F300-GMR-ND - IC 8051 MCU 8K FLASH 11QFN
336-1245-ND - IC 8051 MCU 8K FLASH 11QFN
其它名稱: 336-1283
Rev. 2.9
95
C8051F300/1/2/3/4/5
viced in priority order after the Flash operation has been completed and interrupts have been
re-enabled by software.
10. Make certain that the Flash write and erase pointer variables are not located in XRAM. See
your compiler documentation for instructions regarding how to explicitly locate variables in dif-
ferent memory areas.
11. Add address bounds checking to the routines that write or erase Flash memory to ensure that
a routine called with an illegal address does not result in modification of the Flash.
10.4.3. System Clock
12. If operating from an external crystal, be advised that crystal performance is susceptible to
electrical interference and is sensitive to layout and to changes in temperature. If the system is
operating in an electrically noisy environment, use the internal oscillator or use an external
CMOS clock.
13. If operating from the external oscillator, switch to the internal oscillator during Flash write or
erase operations. The external oscillator can continue to run, and the CPU can switch back to
the external oscillator after the Flash operation has completed.
Additional Flash recommendations and example code can be found in AN201, "Writing to Flash from Firm-
ware", available from the Silicon Laboratories web site.
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