TPS65982ABZBHR datasheet(55/121 Pages) TI1

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RP5

RP100

LDO_3V3

RP100

RP5

LDO_3V3

RP5

RP100

LDO_3V3

RP100

RP5

LDO_3V3

To Digital Core

1st Stage

Mux

2nd Stage

Mux

RPD1

TPS65982

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SLVSD02D – MARCH 2015 – REVISED JUNE 2019

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9.3.4.5 Signal Monitoring and Pullup/Pulldown

The TPS65982 has comparators that may be enabled to interrupt the core when a switching event occurs on any

of the port inputs. The input parameters for the detection are listed in the Port Data Multiplexer Signal Monitoring

Pullup and Pulldown Characteristics table. These comparators are disconnected by application code when these

pins are not digital signals but an analog voltage.

The TPS65982 has pullups and pulldowns between the first and second stage multiplexers of the port switch for

each port output: C_SBU1/2, C_USB_TP/N, C_USB_BP/N. The configurable pullup and pulldown resistances

between each multiplexer are shown in Figure 45.

Figure 45. Port Detect and Pullup/Pulldown

9.3.4.6 Port Multiplexer Clamp

Each input to the 2nd stage multiplexer is clamped to prevent voltages on the port from exceeding the safe

operating voltage of circuits attached to the system side of the Port Data Multiplexer. Figure 46 shows the

simplified clamping circuit. When a path through the 2nd stage multiplexer is closed, the clamp is connected to

the one of the port pins (C_USB_TP/N, C_USB_BP/N, C_SBU1/2). When a path through the 2nd stage

multiplexer is not closed, then the port pin is not clamped. As the pin voltage rises above the VCLMP_IND

voltage, the clamping circuit activates, and sinks current to ground, preventing the voltage from rising further.

TPS65982ABZBHR датащи(PDF) 55 Page - Texas Instruments