FUSB308B datasheet(38/53 Pages) ONSEMI

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FUSB308B

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Table 30. FAULTSTAT (continued)

Address: 1Fh

Reset Value: 0x80

Type: Read/Write 1 to Clear

Bit #

Fault Status Interrupt Description (Note 32)

Size (Bits)

R/W/C

Name

FORCE_DISCH_FAIL

R/WC

0b: No Discharge Failure

1b: VBUS Discharge Failed

Asserts when PWRCTRL.FORCE_DISCH is set and one of

the following occurs:

If VBUS_STOP_DISCH <= vSafe0V(max.) we fail to discharge

VBUS to vSafe0V (max.) within tSafe0V from the time

FORCE_DISCH is set.

If VBUS_STOP_DISCH > vSafe0V(max.) we fail to discharge VBUS

to VBUS_STOP_DISCH within tSrcSettle from the time

FORCE_DISCH is set.

Reserved

Reserved: 0b

Reserved

Reserved: 0b

VCONN_OCP

R/WC

0b: No VCONN Over−Current Detected

1b: Over current on VCONN Latched. See VCONN_ Registers to set

VCONN OCP levels.

I2C_ERROR

R/WC

0b: No Error

1b: I2C Error has occurred

Asserts when: or SINK_TRANSMIT has been sent with TRANS-

MIT_BUFFER empty (TXBYTECNT < 2).

COMMAND.DisableVbusDetect is issued while sinking or sourcing

VBUS.COMMAND.SinkVbus is issued while sourcing

VBUSCOMMAND.SourceVbusDefaultVoltage is issued while sinking

VBUS

COMMAND.SourceVbusHighVoltage is issued when device is not

already sourcing 5 V, is sinking, or is not capable of sourcing high

voltage.

Connect_Invalid State is reached.

31.VBUS_V_BIT[9:0] is the measured VBUS voltage divided by VBUS_SCALE factor.

32.Fault Status are latched and cleared when a 1 is written to the corresponding bit.

33.ALL_REGS_RESET do not get set on SW_RST

Table 31. COMMAND

Address: 23h

Reset Value: 0x00

Type: Read/Write (Auto−Clear)

Bit #

Name

R/W/C

Size

(Bits)

Settings

COMMAND Description

7:0

Command

R/W

0001

0001b

WakeI2C

(no action is taken other than to wake the I2C interface)

0010

0010b

DisableVbusDetect. Disable Vbus present detection:

PWRSTAT.VBUS_VAL. The FUSB308B will ignore this

command and assert the FAULTSTAT.I2C_ERR if it has

sourcing or sinking power over Vbus enabled

0011

0011b

EnableVbusDetect. Enable Vbus present detection

0100

0100b

DisableSinkVbus. Disable sinking power over Vbus.

This COMMAND does not disable PWRSTAT.VBUS_VAL

detection

0101

0101b

SinkVbus. Enable sinking power over Vbus and enable Vbus

present detection. The FUSB308B will ignore this command

and assert the FAULTSTAT.I2C_ERR if it has sourcing power

over Vbus enabled

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