UM1545 datasheet(14/64 Pages) STMICROELECTRONICS

14 / 64 page

APW walkthrough

UM1545

14/64

Doc ID 023225 Rev 1

On the right side of the dialog (highlighted in blue) some miscellaneous preferences

concerning the features of the APW are displayed. Hereafter a list of them by group and a

brief explanation (if needed):

●

Coefficient Settings:

–

Allow Editing Coefficients: this option enables the editing of the filter’s coefficients.

–

Show Value in Hexadecimal: this option allows toggling between the hexadecimal

and the decimal notation when displaying the coefficient’s value. Please note that

in case of decimal notation, the values are displayed with ten numbers after the

comma. For this reason and for space constraints they might not be completely

displayed.

●

Filter Editor Settings:

–

Show Information in EQ Graphic: shows gain and frequency information when

moving with the pointer over the graphic.

●

Miscellaneous:

–

Load Preferences on Startup: the APW loads the preferences used the previous

time.

–

Save Preferences on Exit: when quitting the APW, saves a copy of the current

preferences setup.

●

Startup Operations: this option modifies how the APW interacts with the device at

startup. The APW can read the device configuration from the DUT (Device Under Test)

or set it from its local banks (in this latter case the device defaults will be applied). A No

Operation option is also available. If chosen, the APW will not perform any operation on

the DUT at startup. Please note that by choosing this latter option the device

configuration stored in the APW and the one stored in the device might not be the

same.

On the bottom left side of the dialog are grouped all the preferences concerning the register

I/O setup. Since these options will customize how the APW will behave when performing

any I2C operation, do not modify them unless strictly needed.

●

I2C Options

–

Check for ACK Events: if selected, the APW will check for I2C operations

acknowledge, otherwise it will be ignored.

–

Warn for ACK Failures: through this option the user can choose whether to be

informed in case of I2C failures or not. The check for ACK events option has to be

checked first. Please note that when this option is set, a pop-up message

(Figure 8) will warn the user at each I2C failure, offering the user the possibility of

aborting the operation, retrying it or ignoring any subsequent warning. If this last

option is chosen, the APW will automatically disable the warn for ACK Failures

option. To re-enable it, access the Preferences window as described above.

Figure 8.

I2C failure pop-up message

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