Texas Instruments TPS65291 EVM, Руководство пользователя

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Getting Started
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10 SLVUB61 – July 2017
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TPS65291 EVM User's Guide
Figure 6. B2_Enreg is Enabled by Default in IPG-UI
• Change the B1_Enreg position from Disabled to Enabled while the red voltage lead of the DMM is still
on J7 (B1_VOUT), and then click the W button in the Register0 row to write new values to only this
register. Figure 7 shows that bit 0 now has a value of 1b, B1_Enreg is Enabled , and that until the W
button is clicked the changes made have not yet been written to the TPS65291 device.
– Measure (with the DMM) and verify the voltage at J7 is approximately 3 V.
Figure 7. Enabling BUCK1 (B1_Enreg) in IPG-UI
• Move the red voltage lead of the DMM to J11 (LDO_SW_VOUT), change the LDOnSW_Enreg
position from Disabled to Enabled , and then click the W button in the Register0 row. Figure 8 shows
that bit 2 now has a value of 1b, LDOnSW_Enreg is Enabled , and that after the W button is pressed
all changes made by the user in the GUI have been written to the TPS65291 device. If more than one
register is changed at a time, then the
Write All function will be faster than writing to each register one
at a time.
– Measure (with the DMM) and verify the voltage at J11 is approximately 2.8 V, or 5 to 10 mV below
B2_VOUT because LDO_SW is configured as a load switch by default.