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CS6420-CS Datasheet(PDF) 45 Page - Cirrus Logic |
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CS6420-CS Datasheet(HTML) 45 Page - Cirrus Logic |
45 / 52 page CDB6420 DS205DB1 45 variables to their default values. A warm reset saves certain key variables to allow the CS6420 to adapt to the echo path more quickly. The function of the reset button in the main win- dow are controlled by the radio buttons in the group "When Reset Button is pushed:". The first option will force the CS6420 into a low power mode by holding RST low until the button is pushed again (the text on the button will change to reflect this). The second option will send the current settings of the four registers to the CS6420 immediately after performing the reset. The last option will restore the default values of the registers to the CS6420, which is the mode selected when the program is initially started. Note that this option also changes the register settings in the main window. Also note that once this type of reset is invoked, the reset type will automatically be changed to restore current register values. Main Window Figure 9 shows the main window of the CDB6420 Control Program. The main window is a block di- agram representation of the internals of the CS6420 with all the registers placed in their appropriate lo- cations in the signal flow. The right side of the screen is the Near End (or Acoustic Interface), and the left side is the Far End (or Network Interface. See figure 9). The upper path is the Receive Path, and the lower path is the Transmit Path. The hexa- decimal values of the registers given the current settings of the controls is given in the lower left corner. These values are sent to the CS6420 over the microcontroller interface. The Controls There are 27 controls in the CDB6420 Control Pro- gram main window. These controls map to the four registers in the CS6420 whose register values can be seen in hexadecimal format in the lower left of the main window. The controls can be easily nav- igated by using the "Tab" key to traverse the con- trols from left to right, and "Shift-Tab" to reverse the direction. Furthermore, the four most common- ly used controls have hotkeys which will take you to them: RVol (Ctrl+1), TVol (Ctrl+2), NCC (Ctrl+3), and ACC (Ctrl+4). These are also acces- sible from the “Control” menu. Drop-down Box Hints Once familiar with the values in the drop-down boxes, one can easily choose specific values by typing the first letter of the selection, or using the up and down arrow keys. Typing the first letter of the selection can help avoid lots of scrolling and unnecessary writes to the microcontroller interface. For example, if RVol is currently selected, its value can be changed to 30 dB by pressing 3 once and to 3 dB by pressing it again. 0 dB is selected by press- ing 0, and pressing "m" will select mute. Alterna- tively, if the value is 0 dB, pressing the down arrow will set the register to -3 dB, and pressing the up ar- row will set the value to 3 dB. As another example, when manipulating the Acoustic Coefficient Controls (ACC) drop-down box, the desired setting of the three available selec- tions ("Normal", "Clear", and "Freeze") can be chosen with the keys "n", "c", and "f". If using the arrow keys, going to Freeze from Normal would al- ways result in a Clear, which may not be desired, so pressing "f" would be preferable. You can always use the mouse to select the value. Figure 8. Reset Options |
Similar Part No. - CS6420-CS |
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Similar Description - CS6420-CS |
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