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STUSB4700 bảng dữ liệu(PDF) 8 Page - 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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