STUSB4700 datasheet(8/32 Pages) STMICROELECTRONICS

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Inputs/outputs

STUSB4700

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DocID030193 Rev 2

This pin can be used to sense the voltage level of the main power supply providing VBUS. It

allows to consider independently UVLO and OVLO voltage thresholds on VDD pin as

additional conditions to enable the VBUS power path through VBUS_EN_SRC pin.

2.3.9

GND

Ground.

2.3.10

VVAR_ADDR0

At startup, this pin is latched to set I²C device address 0 bit. During operation, this output

can be used as an analog voltage output to control the power management unit. Analog

value is one tenth of the requested VBUS value. This function can be enabled through

appropriate NVM configuration.

2.3.11

GPIO [4:0]

Table 6: GPIO0 (pin #12) configuration

Select

Value

Configuration

Comments

GPIO0_sel

11b(NVM)

GPIO0 = Sel_PDO2

Active Low

Table 7: GPIO1 (pin #11) configuration

Select

Value

Configuration

Comments

GPIO1_sel

11b(NVM)

GPIO1 = Sel_PDO3

Active Low

Table 8: GPIO2 (pin #14)

– GPIO3 (pin #15) – GPIO4 (pin #16) configuration

Select

Value

Configuration

Comments

GPIO234_sel[1:0]

11b(NVM)

GPIO2 = Sel_PDO4

Active Low

GPIO3 = Sel_PDO5

Active Low

GPIO4 = Attached

Active Low

Other configurations are available (please contact our customer support).

2.3.12

VREG2V7

This pin is used only for external decoupling of 2.7 V internal regulator.

Recommended decoupling capacitor: 1 µF typ. (0.5 µF min; 10 µF max).

This pin must not be used to supply any external component.

2.3.13

VREG1V2

This pin is used for external decoupling of 1.2 V internal regulator.

Recommended decoupling capacitor: 1 µF typ. (0.5 µF min; 10 µF max).

2.3.14

VBUS_DISCH

Control signal for external VBUS_DISCH path.

2.3.15

VCONN

This power input is connected to a power source that can be a 5 V power supply, or a

lithium battery. It is used to supply e-marked cables. It is internally connected to power

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