CDB5464U Datasheet, PDF (13/38 Pages) Cirrus Logic – CDB5464U Engineering Borad and GUI Software

CDB5464U
2.4.1 Refresh Screen Button
The Refresh Screen button will update the contents of the screen by reading all the register values from
the CS5464. It is a good idea to press the Refresh Screen button when entering the Setup window, or
after modifying any registers, to reflect the current status of the CS5464.
2.4.2 Reset DUT Button
The Reset DUT button will hardware reset the CS5464. The CS5464 will perform a reset as discussed in
the CS5464 data sheet. After the hardware reset to the CS5464 device, the screen contents will be auto-
matically refreshed with the updated status of the CS5464.
2.4.3 CS5464 Crystal Frequency
The CS5464 accepts a wide range of crystal input frequencies, and can therefore run at many different
sample rates. The crystal frequency being used on the CS5464 should be entered in this box to provide
accurate frequency calculation in the FFT window. This will also help the software decide which functions
the evaluation system can perform reliably.
2.4.4 Configuration Register
In the Configuration Register box, the contents of the Config register can be modified by typing a hexa-
decimal value in the HEX: field, or by changing any of the values below the HEX: field to the desired set-
tings. Although the CDB5464U software allows the user to modify any of the bits in the Config register,
changing certain bits may cause the software and board to behave erratically. For the evaluation system
to function properly, the IMODE, IINV field should be set to the default Active Low. This applies only to
the CDB5464U evaluation system, and not to the CS5464 chip itself.
2.4.5 Control Register
The Control Register section is used to make changes to and display the contents of the Ctrl register. The
Ctrl register contains various bits used to activate or terminate various features of the CS5464. Refer to
the CS5464 data sheet for descriptions of the bits. The user is able to turn each bit on or off individually.
The value of the Ctrl register is displayed in Hexadecimal format. Most of the Ctrl register bits are reserved
or unused. Only the usable bits are displayed in the Setup Window.
2.4.6 Mask Register / Status Register
The Mask Register / Status Register box displays the values for these registers in hexadecimal and de-
codes them to indicate each bit's function. The Mask register can be modified by typing a value in the
HEX: field, or by checking the appropriate check boxes for the bits that are to be masked. The Status reg-
ister cannot be directly modified. It can only be reset by pressing the Clear Status Register button. The
HEX: field for this register and the lamps are indicators only. A lamp which is on means that the corre-
sponding bit in the Status register is set (except the Invalid Command bit, which is inverted). The value
present in the Mask register may be changed by the software during certain operations to provide correct
functionality of the CDB5464U board.
2.4.7 Mode Control Register
The Mode Control Register section is used to make changes to and display the contents of the Modes
register. The Modes register contains various bits used to set different operation modes for the CS5464
functionalities. Refer to the CS5464 data sheet for descriptions of the bits. The value of the Modes register
DS847DB1
13