STUSB1600 datasheet(31/69 Pages) STMICROELECTRONICS

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STUSB1600

I2C register map

5.1.5

MONITORING_STATUS_TRANS

Address: 0Fh

Access: RC

Note: this register indicates a bit value change has occurred in the MONITORING_STATUS

5.1.6

MONITORING_STATUS

Address: 10h

Access: RO

Note: this register gives the current status of the VBUS and VCONN voltage monitoring done

respectively on the VBUS_SENSE and VCONN pins.

The default value of the VBUS valid voltage range can be changed in the

VBUS_MONITORING_RANGE_CTRL register during operation.

The VBUS vSafe0V threshold is defined in the VBUS_MONITORING_CTRL register. It is

used in source power role as a Type-C FSM condition to establish a valid device

attachment.

Table 22. MONITORING_STATUS_TRANS register

Bit

Field name

Reset

Description

7:4 Reserved

0000b Do not use

VBUS_VALID_TRANS

0b: cleared

1b: transition occurred on VBUS_VALID bit

VBUS_VSAFE0V_TRANS

0b: cleared

1b: transition occurred on VBUS_VSAFE0V bit

VBUS_PRESENCE_TRANS

0b: cleared

1b: transition occurred on VBUS_PRESENCE bit

VCONN_PRESENCE_TRANS

0b: cleared

1b: transition occurred on VCONN_PRESENCE bit

Table 23. MONITORING_STATUS register

Bit

Field name

Reset

Description

7:4

Reserved

0000b

Do not use

VBUS_VALID

0b: VBUS is outside valid voltage range

1b: VBUS is within valid voltage range

VBUS_VSAFE0V

0b: VBUS is above vSafe0V threshold

1b: VBUS is below VSafe0V threshold

VBUS_PRESENCE

0b: VBUS is below UVLO threshold

1b: VBUS is above UVLO threshold

VCONN_PRESENCE

0b or 1b

0b: VCONN is below UVLO threshold

1b: VCONN is above UVLO threshold

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