Texas Instruments TPS65988EVM, User Manual

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Table 5-2. Port B SS MUX Control LED Functions
LED Indicator GPIO Function
D6 - MXCTL0 GPIO_1 USB 3.0 event
D18 - MXCTL1 GPIO_0 DP mode event
D19 - MXCTL2 GPIO_2 Cable orientation event
D25 - PB_HPD GPIO_4 HPD
5.2.2 Status LEDs
LEDs, D5 and D3, are for the variable DC/DC on port A, and port B, respectively. When powering up the EVM,
these LEDs lights up blue. They also provide a voltage discharge path for high to low PD contracts. For higher
voltage PD contracts, D5 and D3 are brighter.
Figure 5-39 highlights these features and Table 5-3 summarizes
the LED behavior.
Figure 5-39. PDO Port A/B LEDs
Table 5-3. Variable DC/DC Control Port A/B Functions
LED Indicator GPIO Function
D20 - PA_PDO0 GPIO_12 PDO TT bit 0
D21 - PA_PDO1 GPIO_13 PDO TT bit 1
D23 - PB_PDO1 GPIO_14 PDO TT bit 1
D22 - PB_PDO0 GPIO_15 PDO TT bit 0
D5 - PA_VAR_DCDC GPIO_16 VAR-A enable
D3 - PB_VAR_DCDC GPIO_17 VAR-B enable
www.ti.com Setup
SLVUB62B – JUNE 2017 – REVISED NOVEMBER 2020
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TPS65988 Evaluation Module 27
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