Customization
13
SLVUBT0 – December 2019
Copyright © 2019, Texas Instruments Incorporated
TPS6594x-Q1 Evaluation Module
Figure 7. Interface Settings for I
2
C Communication
Changing to SPI requires a minor change to the jumper settings and those settings will change in the case
of multiple EVMs in a stackup configuration. These jumper settings are highlighted in yellow in
.
The first jumper to place is on the SPI_EN option on connector J7. Placing this jumper will connect the
micro controller to the SPI bus which is connected to all available PMICs through the EVM stack
connection through J29. In a multiple EVM stackup, this jumper should only be placed on the EVM with
the USB connection to the host computer. The SPI does not have a device ID and therefor the chip select
is used to determine which PMIC will receive and respond to commands on the SPI bus. The signals
SCL2/CS and GPIO1 on J15 should only be jumpered on the EVM which is intended to communicate with
the GUI (through the micro controller). All other EVMs which are stacked should pull GPIO1 high, so that
the PMIC does not respond or interfere with the SPI communication.
