Datasheet

SLDU010
TI CONFIDENTIAL – NDA Restrictions
Page 27 of 50
7.2.1 Resistive AFE Tab
The resistive AFE tab is selected by default when the GUI loads. This corresponds to the
default setting to have the resistive AFE selected on power-up. An image of the resistive AFE
tab along with a description of the buttons can be found below.
Figure 20. Resistive AFE Tab
7.2.1.1 Activate Resistive Bridge AFE
The “Activate Resistive Bride AFE” button configures the PGA400-Q1 for the Resistive AFE by
controlling bit 7 in ESFR 0xA7.
7.2.1.2 Enable Bridge Drive Regulator
The “Enable Bridge Drive Regulator” button enables/disables the VBRG regulator by controlling
bit 2 in ESFR 0xA9.
7.2.1.3 Sensor Select
The “Sensor Select” combo-box controls which input signals are routed through the AFE by
controlling bit 7 of ESFR 0xA9. The combo-box also controls which set of registers the rest of
the resistive AFE GUI controls. By default “Sensor 1” is selected so all of the sensor specific
buttons on the resistive tab as well as the Offset section are set to control the “Sensor 1”
registers. If the combo-box is changed, the buttons will control the registers associated with the
“Sensor 2” inputs.
7.2.1.4 Invert Sensor
The “Invert Sensor” button controls the sign-bit MUX in the PGA400-Q1 by controlling either bit 5
or bit 6 in register 0xA9 depending on the state of the “Sensor Select” combo-box.