Texas Instruments TPS65910 EVM, Руководство пользователя

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Test Set Up
If USB-to-GPIO connector is connected on J1 or J2 then the above signals can be controlled using the
GPIO writes from the GUI. In this case the above jumpers should not be connected. Jumpers should be
left open. In case of SLEEP and GPIO signals there will be contention for VDDIO supply. In case of
PWRHOLD, the device will be damaged. This is because the PWRHOLD signal from USB-to-GPIO is at
3.3V. The HI side of J20 jumper is connected to VRRTC. If VRRTC is shorted to 3.3V then this will
damage the device. When the adapter is connected all IOs should be at 3.3V, so ensure J11 is connected
between VDDIO and 3.3V.
4.2 Test Point Descriptions
Table 10. Test Point Descriptions
Power Domain/Control TP Label Use
VIO J39 VIO_OUT Monitor VIO output voltage
VDD1 J35 VDD1 Monitor VDD1 output voltage
VDD2 J37 VDD2 Monitor VDD2 output voltage
VDD3 J33 VDD3 Monitor VDD3 output voltage
VPLL J25 VPLL Monitor VPLL output voltage
VDAC J24 VDAC Monitor VDAC output voltage
VAUX1 J26 VAUX1 Monitor VAUX1 output voltage
VAUX2 J27 VAUX2 Monitor VAUX2 output voltage
VMMC J28 VMMC Monitor VMMC output voltage
VAUX33 J29 VAUX33 Monitor VAUX33 output voltage
VDIG1 J30 VDIG1 Monitor VDIG1 output voltage
VDIG2 J31 VDIG2 Monitor VDIG2 output voltage
VREF J15 VREF Monitor VREF output voltage
VRRTC J23 VRRTC Monitor VRRTC output voltage
PWRHOLD J20-2 PWRHOLD Monitor PWRHOLD level
PWON S1 POWER ON Power-on switch
SLEEP J19-2 SLEEP Control device status
GPIO/CKSYN J18-2 GPIO/CKSYNC GPIO test point
NRESPWRON TP5 NRESPWON Reset to processor
INT1 TP4 INT1 Interrupt to processor
CLK32KOUT TP6 CLK32KOUT 32KHz to processor
Use J32 for all GND connections for measuring the LDO power supplies. J34, J36, J38, and J40 can be
used for ground connections for measuring DCDC power supplies.
5 Test Set Up
5.1 Equipment
Recommended test equipments:
• Variable 6-V power supply capable of supplying 6 A current
• Voltmeter
•
Oscilloscope
• Windows PC with a universal serial bus (USB) port
• USB-to-GPIO converter
7 SWCU065E – March 2010 – Revised May 2011 Introduction
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