參數(shù)資料
型號: ADSP-2171BSTZ-133
廠商: Analog Devices Inc
文件頁數(shù): 8/52頁
文件大?。?/td> 0K
描述: IC DSP CONTROLLER 16BIT 128TQFP
產(chǎn)品變化通告: Product Discontinuance 27/Oct/2011
Mold Change 11/Jul/2012
標準包裝: 1
系列: ADSP-21xx
類型: 定點
接口: 主機接口,串行端口
時鐘速率: 33MHz
非易失內(nèi)存: 外部
芯片上RAM: 10kB
電壓 - 輸入/輸出: 5.00V
電壓 - 核心: 5.00V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 128-LQFP
供應商設(shè)備封裝: 128-TQFP(14x20)
包裝: 托盤
REV. A
–16–
ADSP-2171/ADSP-2172/ADSP-2173
Example Code
The following example is a code fragment that performs the
filter tap update for an adaptive (least-mean-squared algorithm)
filter. Notice that the computations in the instructions are
written like algebraic equations.
MF=MX0*MY1 (RND), MX0=DM (I2,M1);
/* MF=error*beta */
MR=MX0*MF (RND), AY0=PM (I6,MS);
DO adapt UNTIL CE;
AR=MR1 + AY0, MX0=DM (I2,M1), AY0=PM (I6,M7);
adapt:
PM(I6,M6) =AR, MR=MX0*MF (RND);
MODIFY (I2, M3);
/* Point to oldest data */
MODIFY (I6, M7);
/* Point to start of data */
Interrupt Enable
The ADSP-217x supports an interrupt enable instruction. Inter-
rupts are enabled by default at reset. The instruction source
code is specified as follows:
Syntax:
ENA INTS;
Description: Executing the ENA INTS instruction allows all
unmasked interrupts to be serviced again.
Interrupt Disable
The ADSP-217x supports an interrupt disable instruction. The
instruction source code is specified as follows:
Syntax:
DIS INTS;
Description: Reset enables interrupt servicing. Executing the
DIS INTS instruction causes all interrupts to be
masked without changing the contents of the
IMASK register. Disabling interrupts does not
affect the autobuffer circuitry, which will operate
normally whether or not interrupts are enabled.
The disable interrupt instruction masks all user
interrupts including the powerdown interrupt.
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