Texas Instruments Evaluation Module for TPS65720 TPS65720EVM-515 TPS65720EVM-515 Data Sheet
Product codes
TPS65720EVM-515
Connector and Test Point Descriptions
www.ti.com
4.1.11
J11 /INT / RESET / GND
J11 pin 1 is connected to the open-drain output /INT. J11 pin 2 is connected to the open-drain output
RESET. All open-drain outputs are pulled up with a resistor to the pullup voltage PULLUP. Pullup is
connected to VLDO1 with R10 on the EVM. Pullup also can be connected to VIN and VDCDC1 with the
resistors R20 and R21. J13 pin 3 is connected to GND.
RESET. All open-drain outputs are pulled up with a resistor to the pullup voltage PULLUP. Pullup is
connected to VLDO1 with R10 on the EVM. Pullup also can be connected to VIN and VDCDC1 with the
resistors R20 and R21. J13 pin 3 is connected to GND.
4.1.12
J12 SYS/GPIO0/GPIO1/GPIO2/GPIO3/SYS
Four GPIOs are available on this header.
•
J12 pin 1 is connected to the SYS voltage.
•
J12 pin 2 is connected to GPIO0.
•
J12 pin 3 is connected to GPIO1.
•
J12 pin 4 is connected to GPIO2.
•
J12 pin 5 is connected to GPIO3.
4.1.13
J13
J13 is the interface connector for the I2C interface. Connect a 10-pin ribbon cable between J13 and the
USB-to-GPIO interface.
USB-to-GPIO interface.
4.1.14
JP1
JP1 connects the cathode of the LED D2 to GPIO2. If GPIO2 is configured as a current sink JP1 can be
removed to measure the current through the LED with an ammeter.
removed to measure the current through the LED with an ammeter.
If GPIO2 is configured as an input or output, JP1 must be removed to disconnect the LED D2.
4.1.15
JP2
JP2 connects the cathode of the LED D1 to GPIO3. If GPIO3 is configured as a current sink, JP2 can be
removed to measure the current through the LED with an ammeter.
removed to measure the current through the LED with an ammeter.
4.1.16
JP3 HOLD_DCDC1
Connect a shorting jumper between HOLD_DCDC1 and SYS to enable DCDC1. Note that if a power
supply is connected to AC, DCDC1 is enabled independent of the status of HOLD_DCDC1.
supply is connected to AC, DCDC1 is enabled independent of the status of HOLD_DCDC1.
If the IC is supplied from BAT, DCDC1 is enabled when PB_IN is pulled low. To keep DCDC1 enabled,
HOLD_DCDC1 must be pulled high before /PB_IN is released high.
HOLD_DCDC1 must be pulled high before /PB_IN is released high.
4.1.17
JP4 HOLD_LDO1
Connect a shorting jumper between HOLD_LDO1 and SYS to enable LDO1. Note that if a power supply is
connected to AC, LDO is enabled independent of the status of HOLD_LDO1.
connected to AC, LDO is enabled independent of the status of HOLD_LDO1.
If the IC is supplied from BAT, LDO is enabled when /PB_IN is pulled low. To keep LDO1 enabled,
HOLD_LDO11 must be pulled high before PB_IN is released high.
HOLD_LDO11 must be pulled high before PB_IN is released high.
4.1.18
S1 – PB_IN
This is the pushbutton Input. Pressing S1 pulls PB_IN to GND and therefore enables DCDC1 and LDO1.
To keep DCDC1 / LDO1 enabled, the individual HOLD pins must be pulled high before PB_IN is released
high.
To keep DCDC1 / LDO1 enabled, the individual HOLD pins must be pulled high before PB_IN is released
high.
If a power supply is present at AC, both DCDC1 and LDO1 are enabled independent of the HOLD pins.
6
TPS65720EVM
SLVU324 – March 2010
Copyright © 2010, Texas Instruments Incorporated