6.1 Main Tab

The Main tab has the elemental controls for the EVM and provides a view of the chip status. Starting from top, the main controls are:

• Assert EN: This checkbox asserts logic high level voltage to the TPS65653 EN pin. Asserting EN may enable the Buck regulator(s) depending on the register settings.
• Assert SW Reset: To perform a complete SW reset to the chip, click this checkbox. See the TPS65653 data sheet for explanation of various reset scenarios.

The "Bucks" section provides enable controls and status information for bucks as follows:

• Enable check boxes provide enable/disable control for all bucks.
• The “Current” field provides approximate level of load current on each buck.

The "System Flags / Interrupts / Pins" section as well as the "Interrupt bits" and the "Status bits" sections give data on system faults and warnings. If the interrupt is set for any reason the Interrupt field shall show ‘1’ on red background. The flag causing the interrupt will also be set on the Main tab. Interrupts on TPS65653 can only be cleared by writing '1’ to associated registers. Any individual flag can be cleared by clicking the "Clear" button next to each flag. Some of the flags also have a mask bit. If "Mask" check-box of certain flag is checked, the interrupt is not generated. The "Status" bits will show the current status of the faults.

At the bottom of the GUI window is the "Auto Write" checkbox. If "Auto Write" is checked (default) any checking, un-checking or pull-down menu selections will immediately launch I2C writes to the chip register(s). If not checked, the user can update the chip registers to correspond the configuration selected on the GUI by clicking "Write Registers".

If "Poll Status" is selected the software sends a query to the TPS65653 device at a fixed interval in order to detect the status of the chip, including operation mode and load current. If not selected, user can read the registers by clicking "Read Registers".