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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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CDB5510 Arkusz danych(PDF) 7 Page - Cirrus Logic |
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CDB5510 Arkusz danych(HTML) 7 Page - Cirrus Logic |
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7 / 22 page  CDB5510/11/12/13 DS337DB2 7 option is selected, or the board will not function properly. CS5510/12 Clock from Microcontroller - This op- tion tells the software that a CS5510 or CS5512 is being used, and that the microcontroller will pro- vide the ADC with a master clock. The microcon- troller’s clock frequency is user-selectable from the Setup Window. The clock frequency is limited to integer sub-multiples of the microcontroller’s 3.6864 MHz master clock (3.6864 MHz / N). Be sure that no jumper is installed on HDR7 of the CDB5510 when this option is selected, to avoid contention with the on-board oscillator. CS5510/12 On-Board or External Clock Source - This option tells the software that a CD5510 or CS5512 is being used, and that the master clock from the part will be coming from an outside source. If the on-board 32 kHz oscillator is to be used as the clock source, a jumper should be in- stalled on HDR7 of the CDB5510. If a different clock source is to be used, no jumper should be in- stalled, and the clock source should be connected to the pin labeled SCLK (the top pin) of HDR7 or to the pin labeled SCLK (the lower-left pin) on HDR6. Oscillator Frequency: This box displays the fre- quency of the oscillator that the ADC is running on. When using an external clock source, the user can type in the frequency of the clock source, and the FFT plots will scale accordingly. When using the microcontroller as a clock source, the user should adjust this value until it is close to the desired fre- quency. The value in this box will automatically be adjusted to a frequency that the microcontroller can provide. When using a CS5511 or CS5513, the “Get Internal Freq.” option should be used to deter- mine the converter’s internal oscillator frequency. Sampling Frequency: This box displays the com- puted sampling frequency for the specified oscilla- tor frequency. This number is used when performing FFT analysis. Sleep Mode: This button allows the user to put the ADC in sleep mode. The microcontroller will set SCLK high, and the ADC will power down accord- ing to the data sheet specifications. If an external clock or the on-board oscillator is used, this option should remain off. Get Internal Freq.: This button is only visible when the CS5511 or CS5513 is being used. When pressed, the microcontroller will time the conver- sion cycle of the ADC and the PC software will compute the sampling rate and oscillator frequency based on the results. This button should be pressed when using a CS5511 or CS5513 before collecting data to ensure that any FFT plots are scaled proper- ly. Acquire: When this button is pressed, the microcon- troller will begin collecting conversions from the ADC and sending them to the PC. The PC stores the conversions as a small sample set. From the sample set collected, the high, the low, peak-to-peak, aver- age, and standard deviation, are computed (the size of the data set is set by the “Num To Average” box) and then the display icons are updated. The most re- cent conversion will be displayed in the Last Con- version box in hexadecimal format. This process continues until the STOP button is pressed, or until another window is selected. Num To Average: Input icon that sets the size of the data conversion set referred to when the Ac- quire button is pressed. OF and OD: These two icons represent the OF and OD flags that are part of the ADC’s output word. If one or both of these flags are set, the appropriate icon will light up. Software Calibration Features: Because the CS5510/11/12/13 have no built-in calibration fea- tures, any calibration functionality must be imple- mented in software. The following functions, found in the Software Calibration Box, allow the user to perform software-based calibrations on the ADCs. |
Podobny numer części - CDB5510 |
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Podobny opis - CDB5510 |
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