The SPI command box allows register read and write actions and it also records the SPI status sequentially. There are times when specific register settings may want to be controlled directly instead of through the simplified interface of the GUI. The following section is an example of doing reads and writes for when the LEDMCUEVM-132 is connected to the TPS92520EVM-133 to ensure proper communications.

Figure 5-8 SPI Command Window

To ensure a connection from the board to the TPS92520-Q1 exists, perform the following steps as shown in Figure 5-9.

1. Write the register address eleven (0x11h), which is the CH1TON register, in the Register Address box: 0x11.
2. Double-click the Send button.

The default value of 0x07 for the register 11 will be shown in the SPI Status window, see Figure 5-9.

Figure 5-9 SPI Read Example.

To write data to the associated register address here is an example where channel 1 of the TPS92520EVM-133 is enabled using the write command:

• Click the check box next to Write
• Write the desired data in the box next to Write Data: as shown in Figure 5-10.
• Click Send.

Figure 5-10 SPI Write Example.